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< Back to Issue 4 Big Bang To Black Holes: Probing the Illusionary Nature of Time by Mahsa Nabizada 1 July 2023 Edited by Elijah McEvoy and Caitlin Kane Illustrated by Aisyah Mohammad Sulhanuddin Time is ubiquitous: it governs our daily lives, marking our existence from birth to death. We measure time in seconds, minutes, hours, days or years, using man-made tools like clocks and calendars which reinforce the perception that it is tangible and objective. In fact, the most used noun in English is time (1). However, delving into the realms of science and philosophy, the true nature of time becomes illusionary. We can acknowledge our personal perception of time is inherently subjective. Our experiences of time vary depending on our surroundings, emotional state and physical state. For example, while time may seem to drag on when we're bored or anxious, it can pass quickly when we're having a good time. Although we imagine time to be objective, it could be merely an illusion resulting from the limitations of our perceptions and the conditions of our observation. Exploring these questions requires scientific perspectives, so let's delve into the enigmatic physics of time. In three-dimensional space, physical spaces are fixed, meaning that we can revisit the same location repeatedly. For example, we may visit our favourite restaurant as many times as we wish. However, this is not the case with time. Time only moves forward, and we cannot go back to a previous moment; it belongs to the past and cannot be retrieved (2). This unidirectional nature of time is referred to as the arrow of time. Time is believed to originate from the Big Bang, the event that marked the beginning of the universe (3). From that point, time has progressed towards the present, where you are currently reading this article, and it continues to move into the future. The second law of thermodynamics, known as entropy, plays a crucial role in representing the forward movement of this arrow of time (4). Entropy refers to the state of disorder, uncertainty, or randomness in a system like a measure of the disorder present in the universe. At the moment of the Big Bang, the universe had low entropy, with matter and energy concentrated and organised. However, since that initial state, matter in the universe has been expanding and moving away from each other, leading to an increase in entropy and transforming the universe into a high entropy system. The concepts of the arrow of time and entropy, guided by the second law of thermodynamics, allow for a distinction between the past and the future and play a pivotal role in the existence of life. Without entropy and the resulting change there would be no discernible difference between events that occurred 1000 years ago and events happening in the present. Furthermore, the progression of life from birth to death can be explained through the phenomenon of entropy, as governed by the second law. However, on the quantum level, the behaviour of particles becomes more complex. Just as there is no inherent forward or backward direction in vast space, at the molecular level, the concept of entropy is not as apparent. While time appears to have a clear direction on the macroscopic level, when observing the particles that make up the universe, time can flow and operate in multiple directions. The laws of physics that govern these particles do not distinguish between the past and the future. They describe the behaviours of physical systems without differentiating between temporal directions. The theory of general relativity, proposed by Albert Einstein, provides a fundamental framework for understanding the workings of spacetime (5). According to the theory of general relativity, the presence of mass or energy causes a distortion in the fabric of spacetime, which in turn affects the motion of other objects. For example, it describes gravity as the curvature of spacetime caused by the presence of mass and energy. Essentially, spacetime can be thought of as a fluid that is influenced by both gravity and velocity. This theory has illuminated not just the behaviour of celestial bodies and the vast structure of the universe, but also enhanced our understanding of the intricate interplay between space, time, and matter. Within Einstein’s theories, time dilation is a scientific phenomenon that can be explored through a thought experiment known as the twin paradox (6). It demonstrates how the perception of time can vary between two individuals who experience different levels of motion or gravitational forces. Time dilation is not limited to the twin paradox or space travel; it is a fundamental concept in understanding the relationship between time, motion, and gravity. It has been experimentally confirmed and plays a significant role in our understanding of the universe. Imagine you, Twin A, are stationary on Earth while your sister, Twin B, is traveling in a rocket at a constant speed. Due to the sideways motion of the rocket, Twin B’s clock will appear slower to Twin A since her path through spacetime is longer due to the effects of special relativity and time dilation. Therefore, from Twin A’s perspective on Earth, time seems to pass slower on the moving rocket. However, from Twin B’s perspective, Twin A is the one in motion and therefore Twin A’s clock appears slower to her. Both frames of reference seem to indicate that the other's clock is slower, which seems contradictory. In reality, both observations are correct because the laws of physics remain the same in both frames of reference. Now, the question arises: who is actually younger? According to each twin's viewpoint, the other twin is younger. However, in reality, only one twin can have aged less than the other. Fortunately, there is a resolution to this paradox. When Twin B turns around to return to Earth, she undergoes acceleration which means the usual laws no longer apply. As a result, Twin B will be younger than her Earth-bound sister, Twin A, upon returning to Earth due to the effects of acceleration. To explain this effect during the period of acceleration, we need to consider that general relativity causes time dilation in the presence of gravitational fields. Gravitational time dilation means that clocks run slower in stronger gravitational fields compared to clocks in weaker gravitational fields. During the acceleration phase, when Twin B’s rocket is returning to Earth, her time now appears to go slower, while the clock on Earth appears to run faster. This phenomenon is similar to the extreme time dilation experienced near the edge of a black hole, known as an event horizon (7). From the observer’s frame of reference outside the black hole, time slows as an object approaches the event horizon, until it appears time has stopped. Hence an object falling into the black hole would appear to have stopped, completely frozen. Even though it governs our daily lives and despite our ability to measure it with great accuracy, there is no definitive answer to what time truly is. From the subjective experiences of our daily lives to the enigmatic physics of the Big Bang and black holes, the illusionary nature of time unveils an array of complexities, reminding us that this fundamental concept remains one of the most captivating mysteries of our existence. As famously stated by Einstein: "For us believing physicists, the distinction between past, present, and future is only a stubbornly persistent illusion” (8). References Study: “Time” Is Most Often Used Noun [Internet]. www.cbsnews.com . 2006. Available from: https://www.cbsnews.com/news/study-time-is-most-often-used-noun/ Davies P. The arrow of time. Royal Astronomical Society [Internet]. 2005 Feb 1 [cited 2023 Jun 4];46(1):1.26–9. Available from: https://academic.oup.com/astrogeo/article/46/1/1.26/253257 University of Western Australia. Evidence for the Big Bang [Internet]. Evidence for the Big Bang. 2014 p. 1–4. Available from: https://www.uwa.edu.au/study/-/media/Faculties/Science/Docs/Evidence-for-the-Big-Bang.pdf Hall N. Second Law - Entropy [Internet]. Glenn Research Center | NASA. 2023. Available from: https://www1.grc.nasa.gov/beginners-guide-to-aeronautics/second-law-entropy/ Norton JD. General Relativity [Internet]. sites.pitt.edu . 2001 [cited 2022 Feb]. Available from: https://sites.pitt.edu/~jdnorton/teaching/HPS_0410/chapters/general_relativity/ Perkowitz S. Twin paradox | physics | Britannica. In: Encyclopædia Britannica [Internet]. 2020 [cited 2013 Jun 14]. Available from: https://www.britannica.com/science/twin-paradox Hadi H, Atazadeh K, Darabi F. Quantum time dilation in the near-horizon region of a black hole. Physics Letters B [Internet]. 2022 Nov 10 [cited 2023 Jun 11];834:137471. Available from: https://www.sciencedirect.com/science/article/pii/S0370269322006050 A Debate Over the Physics of Time | Quanta Magazine [Internet]. Quanta Magazine. 2016. Available from: https://www.quantamagazine.org/a-debate-over-the-physics-of-time-20160719/ Previous article Next article back to MIRAGE

Exciting technological leaps are being made in the futuristic field of visual prostheses. Australians suffering from visual impairment can be helped by emerging treatments including Bionic Eyes: a sight for sore eyes. This piece takes a look at the prevalent impairments and our ocular opportunities to treat them. Bionics: Seeing into the Future By Joshua Nicholls While the Bionic Eye might seem like a technology of the far future, exciting advancements are being made in the field of visual prostheses. This piece points a keen eye at emerging treatments for some of the most prominent diseases, along with their possible bionic treatments. Issue 1: September 24, 2021 Illustration by Friday Kennedy Visual prostheses, colloquially known as bionic eyes, are a set of experimental devices designed to restore — or partially restore — vision to those with varying levels of blindness (1). While once viewed as “science fiction”, these technologies are becoming a reality for thousands of Australians with visual impairments. Since its inception in 1956 by the Australian inventor Graham Tassicker (2), the idea of restoring vision using electronics has undergone several developments, ranging from rudimentary cortical stimulation to modern advancements in state-of-the-art retinal implants. As of 2018, it was estimated that over 13 million Australians have some form of visual impairment. Of these 13 million, 411,000 have cataracts or the clouding of the lens; 244,00 have macular degeneration, which degrades fine detail vision; and 133,000 are either partially or entirely blind (3,4). The economic burden of blindness in Australia is substantial. In 2009, it was estimated that the total cost of vision loss per person aged 40 and over was $28,905 — a nationwide total of 16.6 billion AUD (5). Figure 1: Categorisation of Total Economic Cost of Vision Loss in 2009 (5) Age-related macular degeneration (AMD) is one condition for which visual prosthetics may be applicable. AMD refers to the irreversible loss of high-acuity, colour-sensitive cone cells in the centre field of vision. This structure of the retina is responsible for reading, recognising faces, driving, and other visual tasks that require sharp focal vision. In fact, you are using these cells to read this article right now. Its typical onset is later in life, affecting 12% of people aged 80 or over (6). As the leading chronic eye condition for elderly Australians (7), it accounts for 48% of all cases of blindness nationwide (8). According to AIHW4, there is also a higher prevalence amongst females than in males — between 4.9%–6.8% and 3.6–5.1%, respectively. Macular degeneration exists in two forms: dry and wet. Dry macular degeneration is caused by thinning of the macula; it is the most common form of the disease and progresses slowly over many years. Wet macular degeneration is a potentially more severe variation of the disease which is caused by the sudden development of leaky blood vessels around the macula (9). With no known cure — and most treatments being directed towards prevention and delaying progression — interventions relying on prosthetics may be the best hope for the restoration of lost eyesight (10). Graham Tassicker was the first to realise the potential utility of cortical stimulation in restoring sight to those with vision loss. In 1956, Tassicker developed a photosensitive selenium cell which, when placed behind the retina, resulted in phosphene visualisation — the phenomenon of seeing light without light actually entering the eye (2). This was the first evidence of non-cortical stimulation to elicit visual experience. It was in the 1990s that visual prostheses took a radical development; sophisticated retinal surgeries and the creation of biomaterials led to a surge of novel inventions, including cortical implant miniaturisation and artificial retinas — the latter of which is the most advanced to date. There is currently a state-of-the-art retinal bionic system that has recently undergone clinical trial research: the Argus II Retinal Stimulation System. The Argus is an epiretinal (above the retina) implant which has been designed by SecondSight; as of 2013, it was FDA approved for retinitis pigmentosa (RP) but has potential utility for dry AMD. It consists of a device that is implanted in the patient’s eye and an external processing unit worn by the user. The system consists of sixty electrodes, each of which is two-hundred-micrometres in diameter. Images that have been captured by a small camera on glasses are converted into electrical impulses to stimulate surviving ganglion cells on the retina. It is currently the most widely used retinal prosthetic system in the world, with more than 350 RP patients being treated to date. The cost of this device is 150,000 USD — a price that excludes surgery and post-operative training (11). Figure 2: The design of the Argus II (12) In 2015, a case study was performed by the Argus II study group on the impact the implant would have on restoring visual function to subjects who had complete blindness from RP. The results from this study were quite promising; it showed that of the 30 patients who received the Argus II system, all significantly performed better on a white square test than they did without the prosthesis. (None of the subjects scored any points with the device absent.) The Argus also showed reliability for 29 subjects, all of whom still had functioning devices after three years (13). In 2020, a clinical trial of this device for dry AMD was completed. The study, which consisted of five patients, assessed the safety and feasibility of the device. According to Mills et al. (14), no patients reported confusion when operating the Argus alongside their healthy peripheral vision. Adverse events occurred in two patients who experienced proliferative vitreoretinopathy — or tractional retinal detachment. However, due to recent events surrounding the COVID-19 pandemic, the company declared that they would be performing “an orderly wind-down of the company’s operations”. SecondSight is now focusing on a new device: The Orion. This device is designed to stimulate the visual cortex of the brain — a return to the original conception of visual prosthetics. The Orion is planned to expand the pool of patients who are eligible for visual prosthetics. It will essentially bypass the requirement for healthy ganglion cells and a functioning optic nerve, which retinal prosthetics require. The only forms of blindness not encompassed by this technique are congenital forms of blindness or people who are ‘cortically blind’ from suffering damage to the visual cortex area V1. The Orion is modelled after the Argus II with its 60 cortical-stimulating electrodes receiving input from a camera on the user’s glasses. Under the Breakthrough Device Pathway, the FDA approved Orion for an early feasibility study. Six human subjects have been fitted with the device — one woman and five men between the ages of 29 and 57. Of these six, one had endophthalmitis, two had glaucoma, and three suffered trauma. After one year of wearing the device, four of the patients could accurately discern the location of a palm-sized white square on a computer screen, and five could locate its movement in space. The Orion has shown a good safety profile after 12 months of use, and follow-ups on its progress will occur for five years (15). Visual prostheses have a promising and bright future of development ahead of them. While it is still in its infancy, the results of ongoing clinical trials show promise for sight restoration. With multiple models and modes of intervention available, artificial vision is slowly becoming a reality for the visually impaired, but further developments in the field are still required. It would be promising to see advancements from mere two-dimensional grey-scale images to the rich, three-dimensional, and full-colour experience that we take for granted as normal vision. For now, two essential factors need to be improved for the full realisation of artificial vision: cost and electrode density. The Argus costs 150,000 USD — an expense that excludes surgery and training. This figure may be unfeasible for the thousands of Australians who would benefit from such a device. If the current trend of Moore’s Law continues, electrode density will increase whilst the cost of the device will decrease — a trend analogous to the increase in power and improved price of computers in the last century. This pixel density will hopefully improve to the point of achieving near-normal visual acuity. The 60 pixels, while helpful in regaining some functionality, cannot compare to the some 96 million photoreceptor cells in the retina — 5 million of which are located in the cone-dense macula. Nevertheless, artificial vision is an exciting and innovative technology currently under development. While much research is still needed, further advancements in bionics will one day make visual prosthetics a ubiquitous and affordable technology to those in need. About the writer: Joshua Nicholls was the 2021 winner of the Let's Torque competition. Joshua : I am a 5th-year neuroscience and biochemistry student at the Swinburne University of Technology. I finished my Health Science degree a few years ago, majoring in neuroscience. I am now completing my final few subjects in my Bachelor of Science, with biochemistry as my major. For the state-wide Let’s torque competition, I changed my pitch to artificial vision, hence its title, Bionics: Seeing into the Future—a catchy pun, if I do say so myself. I made the rather complex topic of visual prosthetics approachable and understandable to the general audience by, as stated previously, conveying a story. I asked my audience to consider losing vision, if not completely, at least partially. Considering this, I then asked them to imagine what life must be like for the some 13 million Australians of whom suffer from some form of visual impairment. This exercise brought home the very real phenomenon of visual impairment, which many of us have—or will—be impacted. The solution for currently untreatable vision loss is already underway: The Bionic Eye, as it is colloquially known. While it may sound like science fiction, bionics (or prosthetics) are nothing new; artificial hearing through the cochlear implant and artificial limbs are becoming rather ubiquitous. I briefly detailed a few diseases for which visual prosthetics may be appropriate, such as age-related macular degeneration and retinitis pigmentosa, and spoke about past and current clinical trials demonstrating their efficacy. To end my pitch, I talked about the lasting impact these devices will have on people’s lives and the future developments required. In doing so, I relayed the past, present, and future of the bionic eye, which detailed a coherent and relatable story to my audience. I was successful in my pitch and won first place among the state! It was an absolute privilege even to have been a part of this competition; coming first place was an added honour and will remain one of the highlights of my life. I believe this experience will serve as a footstone toward my career in science and science communication. If anyone has any desires to get their foot in the door of this field, get your name and face out there and just go for it! References: Ong, J. M., & da Cruz, L. (2012). The bionic eye: a review. Clinical & experimental ophthalmology, 40(1), 6-17. Tassicker, G. (1956). Preliminary report on a retinal stimulator. The British journal of physiological optics, 13(2), 102-105. Australian Bureau of Statistics. (2018). National Health Survey: First Results, 2017–18. Canberra: ABS Retrieved from https://www.abs.gov.au/statistics/health/health-conditions-and-risks/national-health-survey-first-results/latest-release Australian Institute of Health and Welfare. (2021). Eye health. Canberra: AIHW Retrieved from https://www.aihw.gov.au/reports/eye-health/eye-health Taylor, P., Bilgrami, A., & Pezzullo, L. (2010). Clear focus: The economic impact of vision loss in Australia in 2009. Vision2020. Retrieved from https://www.vision2020australia.org.au/wp-content/uploads/2019/06/Access_Economics_Clear_Focus_Full_Report.pdf Mehta, S. (2015). Age-related macular degeneration. Primary Care: Clinics in Office Practice, 42(3), 377-391. Foreman, J., Xie, J., Keel, S., van Wijngaarden, P., Sandhu, S. S., Ang, G. S., . . . Taylor, H. R. (2017). The prevalence and causes of vision loss in Indigenous and non-Indigenous Australians: the National eye health survey. Ophthalmology, 124(12), 1743-1752. Taylor, H. R., Keeffe, J. E., Vu, H. T. V., Wang, J. J., Rochtchina, E., Mitchell, P., & Pezzullo, M. L. (2005). Vision loss in Australia. Med J Aust, 182(11), 565-568. doi:10.5694/j.1326-5377.2005.tb06815.x Calabrese, A., Bernard, J.-B., Hoffart, L., Faure, G., Barouch, F., Conrath, J., & Castet, E. (2011). Wet versus dry age-related macular degeneration in patients with central field loss: different effects on maximum reading speed. Investigative ophthalmology & visual science, 52(5), 2417-2424. Cheung, L. K., & Eaton, A. (2013). Age‐related macular degeneration. Pharmacotherapy: The Journal of Human Pharmacology and Drug Therapy, 33(8), 838-855. Luo, Y. H.-L., & Da Cruz, L. (2016). The Argus® II retinal prosthesis system. Progress in retinal and eye research, 50, 89-107. SecondSight. (2021). SecondSight: Life in a New Light. Retrieved from https://secondsight.com/ Ho, A. C., Humayun, M. S., Dorn, J. D., Da Cruz, L., Dagnelie, G., Handa, J., . . . Hafezi, F. (2015). Long-term results from an epiretinal prosthesis to restore sight to the blind. Ophthalmology, 122(8), 1547-1554. Mills, J., Jalil, A., & Stanga, P. (2017). Electronic retinal implants and artificial vision: journey and present. Eye, 31(10), 1383-1398. Pouratian N., Yoshor D., & Greenberg R. (2019). Orion Visual Cortical Prosthesis System Early Feasibility Study: Interim Results. Paper presented at American Academy of Ophthalmology Annual Meeting.

By Juulke Castelijn < Back to Issue 3 Believing in aliens... A science? By Juulke Castelijn 10 September 2022 Edited by Tanya Kovacevic and Ashleigh Hallinan Illustrated by Quynh Anh Nguyen Next The question of the existence of ‘intelligent life forms’ on a planet other than ours has always been one of belief. And I did not believe. It was probably the image of a green blob with multiple arms and eyes squelching across the ground and emitting noises unidentifiable as any form of language which turned me off the whole idea. But a book I read one day completely changed my mind; it wasn’t about space at all, but about evolution. ‘Science in the Soul’ is a collection of works written by the inimitable Richard Dawkins, a man who has argued on behalf of evolutionary theory for decades. Within its pages, you will find essays, articles and speeches from throughout his career, all with the target of inspiring deep rational thought in the field of science. A single essay gives enough food for thought to last the mind many days, but the ease and magnificence of Dawkin’s prose encourages the devourment of many pages in a single sitting. The reader becomes engulfed in scientific argument, quickly and completely. Dawkins shows the fundamental importance of the proper understanding of evolution as not just critical to biology, but society at large. Take, for instance, ‘Speaking up for science: An open letter to Prince Charles,’ in which he argues against the modelling of agricultural practices on natural processes as a way of combating climate change. Even if agriculture could be in itself a natural practice (it can’t), nature, Dawkins argues, is a terrible model for longevity. Instead, nature is ‘a short-term Darwinian profiteer’. Here he refers to the mechanism of natural selection, where offspring have an increased likelihood of carrying the traits which favoured their parents’ survival. Natural selection is a reflective process. At a population level, it highlights those genetic traits that increased chances of survival in the past. There is no guarantee those traits will benefit the current generation at all, let alone future generations. Instead, Dawkins argues, science is the method by which new solutions to climate change are found. Whilst we cannot see the future, a rational application of a wealth of knowledge gives us a far more sensitive approach than crude nature. Well, perhaps not crude per se. If anyone is an advocate for the beauty and complexity of natural life, it is surely Dawkins. But a true representation of nature, he argues, rests on the appreciation of evolution as a blinded process, with no aim or ambition, and certainly no pre-planned design. With this stance, Dawkins directly opposes Creationism as an explanation of how the world emerged, a battle from which he does not shy away. Evolution is often painted as a theory in which things develop by chance, randomly. When you consider the complexity of a thing such as the eye, no wonder people prefer to believe in an intelligent designer, like a god, instead. But evolution is not dependent on chance at all, a fact Dawkins argues many times throughout his collection. There is nothing random about the body parts that make up modern humans, or any other living thing - they have been passed down from generation to generation because they enhanced our ancestors’ survival. The underlying logic is unrivalled, including by religion. But that doesn’t mean Dawkins is not a man of belief. Dawkins believes in the existence of intelligent extraterrestrial life, and for one reason above all: given the billions upon billions of planets in our universe, the chance of our own evolution would have to be exceedingly small if there was no other life out there. In other words, we believe there is life out there because we do not believe our own evolution to be so rare as to only occur once. Admittedly, it is not a new argument but it had not clicked for me before. Perhaps it was Dawkins’ poetic phrasing. At this stage it is a belief, underlined by a big ‘if’. How could we ever know if there are intelligent life forms on a planet other than Earth? Dawkins provides an answer here too. You probably won’t be surprised that the answer is science, specifically a knowledge of evolution. We do not have to discover life itself, only a sign of something that marks intelligence - a machine or language, say. Evolution remains our only plausible theory of how such a thing could be created, because it can explain the formation of an intelligent being capable of designing such things. We become the supporting evidence of life somewhere else in the universe. That’s satisfying enough for me. Previous article Next article alien back to

< Back to Issue 7 Soaring Heights: An Ode to the Airliner by Aisyah Mohammad Sulhanuddin 22 October 2024 edited by Lauren Zhang illustrated by Esme MacGillivray A smile at your neighbour-to-be, a quick check and an awkward squeeze as you sidle into your seat: 18A. Window seat, a coveted treasure! A clatter . Whoops! As you fumble for your dropped phone, your feet–which jut out ungracefully onto the aisle, end up as a speed bump for the wheels of someone’s carry-on. Yeowch! It isn’t without more jostling that everyone finally settles into their seats, and with a scan at the window, the tarmac outside is looking busy. Hmm. It makes sense–this flight is just one of the 36.8 million trips around the world flown over the past year (International Air Transport Association, 2024). Commercial aviation has clocked many miles since its first official iteration in 1914: a 27-km long “airboat” route established around Tampa Bay, Florida (National Air and Space Museum, 2022). Proving successful, it catalysed an industry and led to the establishment of carriers like Qantas, and the Netherlands’ KLM. Mechanics of Ascent (and Staying Afloat) As said Qantas plane pulls up in the window view, its tail dipped red with the roo taxies ahead of you on the tarmac. Your plane is now at the front of the runway queue and the engines begin to roar. You’re thrusted backwards as gravity moulds you to your seat. For a split second, as you look out the window, you can’t help but wonder– how on earth did you even get up here? How is this heavy, huge plane not falling out of the sky? The ability for a plane to stay afloat lies in its wings, which allow the plane to fly. The wings enable this through generating lift (NASA, 2022). Lift is described as one of the forces acting on an object like a plane, countering weight under gravity which is the force acting in the opposite direction, according to Newton’s Third Law ( figure 1a ). A plane's wings are constructed in a curved ‘airfoil’ shape with optimal aerodynamic properties: as pressure decreases above the wing with deflected oncoming air pushed up, the velocity increases, as per Bernoulli’s principle. This increases the difference in pressure above and below the wing, which remains high, generating a lift force that pushes the plane upwards (NASA, 2022) ( figure 1b ). Figure 1a. Forces that act on a plane . Note. From Four Forces on an Airplane by Glenn Research Centre. NASA, 2022 . https://www1.grc.nasa.gov/beginners-guide-to-aeronautics/four-forces-on-an-airplane/ . Copyright 2022 NASA. Figure 1b. An airfoil, with geometric properties suitable for generating lift. Note. From Four Forces of Flight by Let’s Talk Science. Let’s Talk Science, 2024. https://letstalkscience.ca/educational-resources/backgrounders/four-forces-flight . Copyright 2021 Let’s Talk Science. Looking laterally, the thrust of a plane’s engines counters the horizontal drag force that airfoils minimise, all whilst maximising lift. Advancements in plane design over the mid-20th century focused on optimising this ‘Lift to Drag ratio’ for greater efficiency, a priority stemming from the austere, military landscape of World War II (National Air and Space Museum, 2022). Influenced by warplane manufacturing trends, the commercial sphere saw a transition from wooden to durable aluminium frames. In conjunction with this, double-wing biplanes were superseded by single-wing monoplanes ( figure 2a, b ), which had a safer configuration that reduced airflow interference whilst maximising speed and stability (Chatfield, 1928). Figure 2a. A biplane, the De Havilland DH-82A Tiger Moth. Note. From DH-82A Tiger Moth [photograph] by Temora Aviation Museum. Temora Aviation Museum, 2017 . https://aviationmuseum.com.au/dh-82a-tiger-moth/ . Copyright 2024 Temora Aviation Museum. Figure 2b. A monoplane, an Airbus A310. Note. From Airbus A310-221, Swissair AN0521293 [photograph] by Aragão, P, 1995. Wikimedia Commons . https://commons.wikimedia.org/wiki/File:Airbus_A310-221,_Swissair_AN0521293.jpg CC BY-SA 3.0. Taking a Breather Without really noticing it, you’re somewhat upright again. Employing head shakes and gulps to make your own ears pop, you can also hear the babies bawling in discomfort a few aisles back. Blocked ears are our body’s response to atmospheric pressure changes that occur faster than our ears can adjust to (Bhattacharya et al., 2019). Atmospheric pressure describes the weight of air in the atmosphere above a given region of the Earth’s surface (NOAA, 2023), which decreases with altitude. Our bodies are suited to pressure conditions at sea level, allowing sufficient intake of oxygen through saturated haemoglobin within the bloodstream. Subsequently, the average human body can maintain this intake until 10000 ft (around 3000 m) in the air, with altitudes exceeding this likely to result in hypoxia and impairment (Bagshaw & Illig, 2018). Such limits have had implications for commercial flying. Trips in the early era were capped at low altitudes and proved highly uncomfortable: passengers were exposed to chilly winds, roaring engines, and thinner air, and pilots were forced to navigate around geographical obstacles like mountain ranges and low-lying weather irregularities. However, this changed in 1938 when Boeing unveiled the 307 Stratoliner, which featured pressurised cabins. Since then, air travel above breathing limits became possible, morphing into the high-altitude trips taken today (National Air and Space Museum, 2022). Via a process still relevant to us today, excess clean air left untouched by jet engines in combustion is diverted away, cooled, and pumped into the cabin (Filburn, 2019). Carried out in incremental adjustments during ascent and descent, the pressure controller regulates air inflow based on the cockpit’s readings of cruising altitude. Mass computerisation in the late 20th century enabled precise real-time readings, allowing safety features like sensitive pressure release valves, sensor-triggered oxygen mask deployment, or manual depressurisation. However, the sky does indeed dictate the limits, as pressure conditions are simulated at slightly higher altitudes than sea level to avoid fuselage strain (Filburn, 2019). This minor pressure discrepancy plays a part in why we feel weary and tired whilst flying–our cells are working at an oxygen deficit for the duration of the flight. Your yawn just about now proves this point. Time for your first snooze of many… Food, Glorious Food A groggy couple of hours later and it’s either lunch time or dinner, your head isn’t too sure. You wait with bated breath, anticipating the arrival of the flight attendant wheeling the bulky cart through the narrow aisle... Only to be met with a chicken sausage that vaguely tastes like chicken, with vaguely-mashed potato and a vaguely-limp salad on the side. Oh, and don’t forget the searing sweetness of the jelly cup! You’re far from alone in your lukewarm reception of your lunch-dinner. Aeroplane food remains notorious amongst travellers for its supposedly flat taste. Whilst airlines like Thai Airways and Air France have employed Michelin-star chefs to translate an assortment of gourmet cultural dishes to tray table fare (De Syon, 2008; Thai Airways, 2018), the common culprit responsible for the less-than-appetising experience remains – being on a plane. As Spence (2017) details, multiple factors play into how you rate your inflight dinner, many relating to the effects of air travel on our bodies. The ‘above sea level’ air pressure within the plane coincides with higher thresholds for detecting bitterness at 5000-10000 ft (around 1500-3000m), heightening our sensitivity to the tart undertones of everyday foods. Dry pressurised air that cycles through the cabin is about as humid as desert environments, which hampers our smell perception and thus taste. Less intuitively, the loud ambient noise of the plane’s engines also appears to hinder olfactory perception, though the reason as to why remains unclear. Nevertheless, alleviating the grumbling passenger and stomach is an area of interest with a few successful forays. One angle of approach involves food enhancement. Incorporating sensory and textural elements into meals such as chillies and the occasional crunch or crackle can compensate for impaired perception. Interestingly, umami has been observed as the least affected taste sense mid-air (Spence, 2017), inspiring British Airways’ intense and aromatic umami-rich menus – though with the unwitting drawback of threatening to stink up the plane on multiple occasions (Moskvitch, 2015). Meanwhile, Singapore Changi Airport houses a simulation chamber for food preparation in a low-pressure environment, taking it up a notch in both quality and cost (Moskvitch, 2015). Alternatively, passengers can be psychologically tricked into perceiving food to be more appetising than it is in reality. Some examples of this include the use of noise-cancelling headphones, cabin lighting designed for enhancing the appearance of food, or appealing language for describing meals. Both off-ground and in air, it was found that humans were inclined to respond more positively to dishes described in an appetising and detailed manner (Spence, 2017), rather than the vague choices of “sausage or pasta”. Whilst these innovations have covered some ground, De Syon (2008) also notes that sociology can influence our perceptions of food on a plane. The enjoyment of meals is dependent upon core social rituals like dining communally or comforting meal-time habits–both of which are tricky to navigate and achieve on a packed plane with front-on seating. What Goes Up Must Come Down Not long now! Accompanied by the movies you’ve played for the first time in your life and oodles of complimentary tea, there’s about half an hour left until landing. Jolt! The seatbelt sign is bold and bright as you can feel the plane gradually descending–it’s getting bumpy! As your plane rocks about and the airport comes into view as a speck in the distance, your descent is at the mercy of the crosswinds… and turbulence? Not only do these vortices of air cause havoc mid-flight, near cloud bands and thunderstorms (National Weather Service, 2019), they also pose a challenge during landing in the form of local, “clear-air” convection currents invisible on radar. These currents often occur in summer months and in the early afternoon when incoming solar energy is at its highest. In particular, they emerge when the surface of the earth is unevenly heated, including across regions such as the oceans, grassland, or in this case, the pavement near the airport. Consequently, this creates pockets of warm and cool air that rapidly rise and fall, creating downdrafts, thereby trapping planes ( figure 3 ). Luckily, pilots are specifically trained to recognise these surface winds, and can adjust their landing glidepath to suit local conditions forewarned in Terminal Aerodrome Forecasts for a steady, controlled descent (BOM, 2014). Figure 3. Varying glidepath due to local convection currents - note the different types of surfaces. Note. From Turbulence by National Weather Service. National Weather Service, 2019. https://www.weather.gov/source/zhu/ZHU_Training_Page/turbulence_stuff/turbulence/turbulence.htm . Copyright 2019 National Weather Service. Even with its bumpier experiences that draw endless complaints, it is undeniable that commercial aviation has grown tremendously over the century to deliver the safe, efficient and comfortable flights we are accustomed to today. Building upon a history of ingenuity and scientific discovery, it's almost certain that the industry will soar to even greater heights in our increasingly globalised world. Enough talk–you’re finally here! It’s a relief when you clamber from your seat, giving those arms and legs a much needed stretch. Now, time to trod along on solid ground… …and onto the connecting flight. Cheap stopover tickets. Darn it. References Aragão, P. (1995). Airbus A310-221, Swissair AN0521293 . Wikimedia Commons. https://upload.wikimedia.org/wikipedia/commons/9/9b/Airbus_A310-221%2C_Swissair_JP5963897.jpg Bagshaw, M., & Illig, P. (2019). The aircraft cabin environment. Travel Medicine , 429–436. https://doi.org/10.1016/b978-0-323-54696-6.00047-1 Bhattacharya, S., Singh, A., & Marzo, R. R. (2019). “Airplane ear”—A neglected yet preventable problem. AIMS Public Health , 6 (3), 320–325. https://doi.org/10.3934/publichealth.2019.3.320 BOM. (2014). Hazardous Weather Phenomena - Turbulence . Bureau of Meteorology. http://www.bom.gov.au/aviation/data/education/turbulence.pdf Chatfield, C. H. (1928). Monoplane or Biplane. SAE Transactions , 23 , 217–264. http://www.jstor.org/stable/44437123 De Syon, G. (2008). Is it really better to travel than to arrive? Airline food as a reflection of consumer anxiety. In Food for Thought: Essays on Eating and Culture (pp. 199–207). McFarland. Filburn, T. (2019). Cabin pressurization and air-conditioning. Commercial Aviation in the Jet Era and the Systems That Make It Possible , 45–57. https://doi.org/10.1007/978-3-030-20111-1_4 International Air Transport Association. (2024). Global Outlook for Air Transport . https://www.iata.org/en/iata-repository/publications/economic-reports/global-outlook-for-air-transport-june-2024-report/ Let’s Talk Science. (2024). Four Forces of Flight . Let’s Talk Science. https://letstalkscience.ca/educational-resources/backgrounders/four-forces-flight Moskvitch, K. (2015, January 12). Why does food taste different on planes? British Broadcasting Corporation. https://www.bbc.com/future/article/20150112-why-in-flight-food-tastes-weird NASA. (2022). Four forces on an Airplane . Glenn Research Center | NASA. https://www1.grc.nasa.gov/beginners-guide-to-aeronautics/four-forces-on-an-airplane/ National Air and Space Museum. (2022). The Evolution of the Commercial Flying Experience . National Air and Space Museum; Smithsonian. https://airandspace.si.edu/explore/stories/evolution-commercial-flying-experience National Weather Service. (2019). Turbulence . National Weather Service. https://www.weather.gov/source/zhu/ZHU_Training_Page/turbulence_stuff/turbulence/turbulence.htm NOAA. (2023). Air pressure . National Oceanic and Atmospheric Administration. https://www.noaa.gov/jetstream/atmosphere/air-pressure Spence, C. (2017). Tasting in the air: A review. International Journal of Gastronomy and Food Science , 9 , 10–15. https://doi.org/10.1016/j.ijgfs.2017.05.001 Temora Aviation Museum. (2017). DH-82A Tiger Moth . Temora Aviation Museum. https://aviationmuseum.com.au/dh-82a-tiger-moth/ Thai Airways. (2018). THAI launches Michelin Star street food prepared by Jay Fai for Royal Silk Class and Royal First Class passengers . Thai Airways. https://www.thaiairways.com/en_ID/news/news_announcement/news_detail/News33.page Previous article Next article apex back to

< Back to Issue 4 Echidnas: Gentle Courters In The Competitive Animal Kingdom by Emily Siwing Xia 1 July 2023 Edited by Maddison Moore and Arwen Nguyen-Ngo Illustrated by Christy Yung When we think of animals or nature in competition, we picture aggression and savagery over resources such as food, territory and mates. Beyond aggression, however, the variety of animal behaviour associated with competition for resources is immense. A gentle form of competition is the bizarre mating ritual of our own unique Australian fauna: the echidna. Known as Tachyglossus Aculeatus and spiny anteaters, echidnas are quill-covered animals living in Australia and New Guinea. Since Australia is so isolated from other continents, our fauna has often been regarded by outsiders with an air of mystery and awe. To start with, echidnas are in the same family as the famed platypus, called monotremes (egg-laying mammals). Surviving monotreme species can only be found in Australia and New Guinea. The four species of echidnas, along with their duck-billed cousin, are the very few surviving members in this classification. Despite the similarities in their name and appearance in both being covered with hollow, spiny quills, these spiny anteaters are not actually closely related to the more well-known anteaters in the Americas on a genetic and evolutionary basis. Echidnas feed on a diet of ants and termites, using their electroreceptive beaks to find burrowing prey digging them out with their hind claws. These powerful claws are long and curved backwards, specially designed for digging. Funnily, when the British Museum received an echidna specimen, they switched the backward claws frontwards thinking that it was a mistake. As mentioned before, mating rituals can be a violent (even bloody) ordeal in nature. From barbed penises in cats and deadly fights for females in elephant seals, straight to sexual cannibalism in praying mantises, there seems to be endless examples of brutality in the animal world. However, behind these brutal images is another side of nature that seems gentle and even humorous at times: for example, the ritual of our spiny suitors. Echidna mating rituals begin with the formation of a mating train. From June to September in Australia, male echidnas mate by lining up — from their beak tips to their spiny bottoms — to follow behind one single female. These trains can have more than 10 males in line and last for days, even weeks, at a time. During the mating season, male echidnas may leave a train to join or form a different train behind another eligible female. Their mating efforts often lead males to travel for long distances, even beyond their own home ranges. If the males get interrupted and lose track of the female, they reform their train by picking up her scent with their snouts in the air. They are such determined suitors that it is extremely difficult for a female echidna to evade them. Usually, there is one male that remains through the long-winded process, and they get to mate with the female. The reason behind forming echidna trains is unknown, but scientists generally agree that it is correlated with some type of selection process. One theory is that it aids the female in weeding out all the weaker males by tiring them out until the last one remains. Another is that the female is waiting for the right male that she is interested in to get behind her. Either way, it is a process of determination and perseverance. In exceedingly rare occasions where there are still multiple suitors left at the end, the males dig a trench surrounding the female and compete through head bumping. Although there is still much not understood about head bumping due to its scarce occurrence, it is generally considered an echidna social behaviour that serves to maintain dominance. Head bumps are generally only given by dominant echidnas to subordinate echidnas who haven’t recognised their dominance status and moved away. This rarely happens and is a relatively peaceful affair compared to conflicts in other animals. The winner of the mating head bumping ritual then digs until the previously mentioned trench is deep enough for him to be below the female so they can mate through their cloacas. 23 days after copulation, the female lays a soft-shelled leathery egg into a temporary pouch where it continues to incubate for 10 more days when a tiny puggle (a baby echidna or platypus) hatches. The puggle drinks milk from the female’s special mammary hairs until it is capable of feeding itself and has fully covered spines and fur. At last, the matured echidna leaves their mother’s burrow to live independently. The mating rules and practices amongst echidnas are a demonstration of patience and courtesy. This contrasts with the general public misconception of nature being merciless, which is characterised by the brutal competition for food, social status and mating opportunities. Although they are in the same competition for a mate, the lines of waddling echidnas are polite, organised and humorous. Behind the mask of brutality, nature continues to have its pleasant secrets. References Morrow G, Nicol SC. Cool Sex? Hibernation and Reproduction Overlap in the Echidna. PLoS One. 2009 Jun 29;4(6):e6070. Echidna [Internet]. AZ Animals. [cited 2023 Jun 22]. Available from: https://a-z-animals.com/animals/echidna/ Anne Marie Musser. Echidna | Britannica [Internet]. 2023 [cited 2023 Jun 22]. Available from: https://www.britannica.com/animal/echidna-monotreme Echidna trains: explained [Internet]. Australian Geographic. August 6, 2021 [cited 2023 Jun 22]. Available from: https://www.australiangeographic.com.au/topics/wildlife/2021/08/echidna-trains-explained/ Lindenfors P, Tullberg BS. Evolutionary aspects of aggression the importance of sexual selection. Adv Genet. 2011;75:7–22. Warm Your Heart With Videos of ‘Echidna Love Trains’ [Internet]. Atlas Obscura. September 1, 2017. [cited 2023 Jun 22]. Available from: http://www.atlasobscura.com/articles/echidna-love-trains Previous article Next article back to MIRAGE

Doubting time is real? We spoke to first-year uni student Mahsa Nabizada about her upcoming article on this very topic, plus advice for starting university and why Thorium has a special place in her heart. Mahsa is a writer at OmniSci and a first-year university student planning to study mathematical physics. For Issue 4: Mirage, she is writing about the illusion of time. Mee t OmniSci writer Mahsa Nabizada Mahsa is a writer at OmniSci and a first-year university student planning to study mathematical physics. For Issue 4: Mirage, she is writing about the illusion of time. interviewed by Caitlin Kane What are you studying? I’m studying a Bachelor of Science, and I’m in my first year so I haven't majored yet, but what I’m looking to major in right now is mathematical physics. Do you have any advice for yourself at the beginning of semester, the start of your uni journey? First of all, take it easy. This is a new experience, not only moving out of home, but transitioning from high school to university. I think take your time adjusting to everything and be kind to yourself. Also, really be open to different opportunities, whether that’s meeting new people or learning new topics and new areas. In high school, the fields you're exposed to are very limited but in university it’s much broader. Just like the amount of clubs that are available or opportunities to meet people from different industries. What first got you interested in science? I have always found a natural inclination towards science subjects, and the amount of growth in the industry, whether advancements in technology or health… All of those things I can see the impact in society on the day to day and how it would impact the average person. There are new job descriptions being developed, areas that will be opened in five years. I guess the opportunities that are available, and the excitement and impact that STEM can make in society and to the average person. Do you have a dream role as a scientist, like something that you’ve always imagined doing or that you’re working towards? I don’t have a role in mind, but I do have things I’d love to be involved in. One of those things is research… development in any area, especially STEM areas. I think I'd love to be involved in some sort of research in a future role, no matter what area. I would love to be involved personally or professionally in some kind of community service, like volunteering to work with kids or high school students who are interested in STEM. In high school, I had people who spoke to me about STEM and I found that really helpful. Things like that do make a big impact on students and what they choose or what they are encouraged in going forward.. I would love to be working with a team of diverse professionals solving issues that affect people in society day-to-day. When diverse minds come together, there is opportunity for great things to come out of that. I think that is how I would like to make a positive impact. What is your role at OmniSci? I am a writer and basically I’m given a platform to write on the theme an article about something that I’m interested in. There’s quite a lot of flexibility to that and part of the great thing about this role is that I’m also supported by an editor to help me with my ideas. How did you get involved with OmniSci? What made you want to get involved? In O-Week, I met someone who mentioned the club. It stuck in my head. During week two or three, I was like I really want to join some clubs, ones that I can contribute in and make some friends, ones that would have some like-minded students in it. Hence, I became a member and I heard about the role of writer in the email. Are there other roles or article ideas that you would be interested in trying in the future? I definitely would like to keep writing. There is just so much in the astrophysics area that I’m interested in, but also in the STEM area in general. Moving forward I’d like to contribute as a writer interviewing really interesting people at our university, the University of Melbourne. I think we have some great researchers, amazing talented people, on different projects. As I’ve been supported by my editor and Editor-in-Chief, I would like to in the future also support other writers as an editor or as part of another role in the club to support other writers and members to develop their ideas. Can you give us a sneak peek of what you're working on this issue? Examining the illusion of time is something that I’ve thought about before, how our perception of time on a day-to-day basis is subjective. Sometimes it flies by, sometimes it goes so slowly and why we feel that. Because I come from a physics background, I wanted to bring physics into this and examine those experiences. Right now, I am now at the writing stage on the experience of time, how it varies based on our surroundings, emotional stage and physical state. It is possible that it’s nothing more than an illusion created by the limitations of our perception and conditions of our observation. Moving forward I would like to explore this — it’s a fascinating topic — and interview someone in the field of astrophysics more on the theory of relativity and how time moves relative to the observer, time's connection with gravity… that’s where I’m at right now. What do you like doing in your spare time (when you're not contributing at OmniSci)? I enjoy reading about a variety of different topics, whether that’s fiction, physics, different science areas, but also philosophy. I enjoy sometimes playing chess, hanging out with my friends, and I’m also into watching different plays. I watched Macbeth recently and I'm going to watch another play soon. Do you have any recommendations for any books, articles, plays, other kinds of things that you’ve been getting into? With plays I would say it can depend on what you like. If you find that a play is hard to read, I would suggest not giving up, and going and seeing if you can watch it. Sometimes that can be more engaging. With philosophy I just like researching… there’s lots of different philosophical resources out there. I learn a lot when I’m talking to someone and they don’t agree with me and I go in with an open mind. By the end of the conversation my opinion might have changed, or I might have learnt a completely new philosophical idea that might have changed my view on a certain issue. Which chemical element would you name your firstborn child (or pet) after? I would say... Uranium or Thorium. In grade eleven or grade twelve, my physics assignment was on nuclear power so I spent a lot of time researching Uranium and Thorium, and nuclear fusion, nuclear fission and nuclear power in general. I spent a lot of time, not just on my assignment, but in my own time learning about nuclear power and its future. Either of those, just because I’ve spent a lot of time researching it. I don’t think a child, but potentially a pet if I run out of other ideas. Is there anything else that you wanted to share with the OmniSci community? I think the club in general is quite inspiring. The fact that most people are volunteers and students are taking initiative and time out of their schedule to be a part of this. Read Mahsa's articles Big Bang to Black Holes: Illusionary Nature of Time

< Back to Issue 5 Wicked Invaders of the Wild Serenie Tsai 24 October 2023 Edited by Krisha Darji Illustrated by Jennifer Nguyen Since the beginning of time, there has been a continuous flow of species in and out of regions that establishes a foundation for ecosystems. When species are introduced into new environments and replicate excessively to interfere with native species, they become invasive. Invasive species refer to those that spread into new areas and pose a threat to other species. Factors contributing to their menacing status include overfeeding native species, lack of predators, and outcompeting native species (Sakai et al., 2001). Invasive species shouldn’t be confused with feral species which are domestic animals that have reverted to their wild state, or pests which are organisms harmful to human activity (Contrera-Abarca et al., 2022; Hill, 1987). Furthermore, not all introduced species are invasive; crops such as wheat, tomato and rice have been integrated with native agriculture successfully. Many species were introduced accidentally and turned invasive; however, some were intentionally introduced to manage other species, and a lack of foresight resulted in detrimental ecological impacts. Each year, invasive species cost the global economy over a trillion dollars in damages (Roth, 2019). Claimed ecological benefits of invasive species Contrary to the name, invasive species could potentially benefit the invaded ecosystem. Herbivores can reap the benefits of the introduced biodiversity, and native plants can increase their tolerance (Brändle et al., 2008; Mullerscharer, 2004). Deer and goats aid in suppressing introduced grasses and inhibit wildfires (Fornoni, 2010). Likewise, species such as foxes and cats have the capacity to regulate the number of rats and rabbits. Furthermore, megafaunal extinction has opened opportunities to fill empty niches, for example, camels could fill the ecological niche of a now-extinct giant marsupial (Chew et al., 1965; Weber, 2017). Thus, studies indicate the possibility of species evolving to fill vacant niches (Meachen et al., 2014). Below, I’ll explore the rise and downfall of invasive species in Australia. Cane toad Cane toads are notorious for their unforeseen invasion. Originally introduced as a biological control for cane beetles in 1935, their rookie status was advantageous to their proliferation and dominance over native species (Freeland & Martin, 1985). Several native predators were overthrown and native fauna in Australia lacked resistance to the cane toad’s poison used as a defence mechanism (Smith & Philips, 2006). However, research suggests an evolutionary adaptation to such poison (Philips &Shine, 2006). There isn't a universal method to regulate cane toads, so efforts to completely eradicate cane toads are futile. However, populations are kept low by continuously monitoring areas and targeting cane toad eggs or their adult form. Common Myna The origins of Common Myna introduced into New South Wales and Victoria are uncertain; however, it was introduced into Northern Queensland as a mechanism to predate on grasshoppers and cane beetles(Neville & Liindsay, 2011) and introduced into Mauritius to control locust plagues (Bauer, 2023). The Common Myna poses an alarming threat to ecosystems and mankind, its severity is elucidated by its position in the world’s top 100 invasive species list (Lowe et al., 2000). It has spurred human health concerns including the spread of mites and acting as a vector for diseases destructive to human and farm stock (Tidemann, 1998). Myna also has a vicious habit of fostering competition with cavity-nesting native birds, forcing them and their eggs from their nest, however, the extent of this is unclear, and the influence of habitat destruction needs to be considered (Grarock et al., 2013). The impact of this bird lacks empirical evidence, so appropriate management is undecided (Grarock et al., 2012). However, modification of habitats could be advantageous as the Myna impact urban areas more, whereas intervening in their food resources would be rendered useless with their highly variable diet (Brochier et al., 2012). Zebra mussels Zebra mussels accidentally invaded Australia's aquatic locality when introduced by the ballast water of cargo ships. From an ecological perspective, Zebra Mussels overgrow the shells of native molluscs and create an imbalance within the ecosystem (Dzierżyńska-Białończyk et al., 2018). From a societal perspective, it colonizes docks, ship hulls, and water pipes and damages power plants (Lovell et al., 2006) Controlling the spread of Zebra Mussels includes manual removal, chlorine, thermal treatment and more. Control methods It is crucial to deploy preventative methods to mitigate the spread of invasive species before it becomes irreversible. Few known control methods are employed for certain types of animals but with no guarantee of success. Some places place bounties on catching the animals, however, the results of this technique are conflicting. In 1893, foxes were the target of financial incentives, but the scheme was deemed ineffective (Saunders et al., 2010). However, government bounties were introduced for Tasmanian tigers in 1888, which drastically caused a population decline and their eventual extinction (National Museum of Australia, 2019). Similarly, the prevalence of Cane Toads became unbearable, and in response, armies were deployed, and fences in rural communities were funded. Moreover, in 2007, inspired by a local pub’s scheme to hand out beers in exchange for cane toads, the government staged a “Toad Day Out” to establish a bounty for cane toads (Williams, 2011). Invasive species are detrimental to ecosystems, whether introduced intentionally or by accident, management of species is still a work in progress. References Lowe S., Browne M., Boudjelas S., & De Poorter M. (2000) 100 of the World’s Worst Invasive Alien Species: A selection from the Global Invasive Species Database . The Invasive Species Specialist Group (ISSG). Bauer, I. L. (2023). T he oral repellent–science fiction or common sense? Insects, vector- borne diseases, failing strategies, and a bold proposition. Tropical Diseases, Travel Medicine and Vaccines, 9(1), 7. Brändle, M., Kühn, I., Klotz, S., Belle, C., & Brandl, R. (2008). Species richness of herbivores on exotic host plants increases with time since introduction of the host. Diversity and Distributions, 14(6), 905–912. https://doi.org/10.1111/j.1472-4642.2008.00511.x Brochier, B., Vangeluwe, D., & Van den Berg, T. (2010). Alien invasive birds. Revue scientifique et technique, 29(2), 217. Chicago. Cayley, N. W., & Lindsey, T. What bird is that?: a completely revised and updated edition of the classic Australian ornithological work . Chew, R. M., & Chew, A. E. (1965). The Primary Productivity of a Desert-Shrub ( Larrea tridentata ) Community . Ecological Monographs, 35(4), 355–375. https://doi.org/10.2307/1942146 Contreras-Abarca, R., Crespin, S. J., Moreira-Arce, D., & Simonetti, J. A. (2022). Redefining feral dogs in biodiversity conservation . Biological Conservation, 265, 109434. https://doi.org/10.1016/j.biocon.2021.109434 Fornoni, J. (2010). Ecological and evolutionary implications of plant tolerance to herbivory. Functional Ecology, 25(2), 399–407. https://doi.org/10.1111/j.1365-2435.2010.01805.x Freeland, W. J., & Martin, K. C. (1985). The rate of range expansion by Bufo marinus in Northern Australia , 1980-84 . Wildlife Research, 12(3), 555-559. Grarock, K., Lindenmayer, D. B., Wood, J. T., & Tidemann, C. R. (2013). Does human- induced habitat modification influence the impact of introduced species? A case study on cavity-nesting by the introduced common myna ( Acridotheres tristis ) and two Australian native parrots. Environmental Management, 52, 958-970. G. Smith, J., & L. Phillips, B. (2006). Toxic tucker: the potential impact of Cane Toads on Australian reptiles . Pacific Conservation Biology, 12(1), 40. https://doi.org/10.1071/pc060040 G. Smith J, L. Phillips B. Toxic tucker: the potential impact of Cane Toads on Australian reptiles. Pacific Conservation Biology [Internet]. 2006;12(1):40. Available from: http://www.publish.csiro.au/pc/PC060040 Hill, D. S. (1987). Agricultural Insect Pests of Temperate Regions and Their Control . In Google Books. CUP Archive. https://books.google.com.au/books?hl=en&lr=&id=3-w8AAAAIAAJ&oi=fnd&pg=PA27&dq=pests+definition&ots=90_-WiF_MZ&sig=pKxuVjDJ_bZ3iNMb5TpfXA16ENI#v=onepage&q=pests%20definition&f=false Lovell, S. J., Stone, S. F., & Fernandez, L. (2006). The Economic Impacts of Aquatic Invasive Species: A Review of the Literature. Agricultural and Resource Economics Review, 35(1), 195–208. https://doi.org/10.1017/s1068280500010157 Meachen, J. A., Janowicz, A. C., Avery, J. E., & Sadleir, R. W. (2014). Ecological Changes in Coyotes ( Canis latrans ) in Response to the Ice Age Megafaunal Extinctions . PLoS ONE, 9(12), e116041. https://doi.org/10.1371/journal.pone.0116041 Mullerscharer, H. (2004). Evolution in invasive plants: implications for biological control . Trends in Ecology & Evolution, 19(8), 417–422. https://doi.org/10.1016/j.tree.2004.05.010 ANU. Myna problems. (n.d.). Fennerschool-Associated.anu.edu.au . http://fennerschool- associated.anu.edu.au//myna/problem.html National Museum of Australia. (2019). Extinction of thylacine | National Museum of Australia . Nma.gov.au . https://www.nma.gov.au/defining-moments/resources/extinction-of-thylacine Cayley, N. W. & Lindsey T. (2011) What bird is that?: a completely revised and updated edition of the classic Australian ornithological work . Walsh Bay, N.S.W.: Australia’s Heritage Publishing. Phillips, B. L., & Shine, R. (2006). An invasive species induces rapid adaptive change in a native predator: cane toads and black snakes in Australia . Proceedings of the Royal Society B: Biological Sciences, 273(1593), 1545–1550. https://doi.org/10.1098/rspb.2006.3479 Roth, A. (2019, July 3). Why you should never release exotic pets into the wild. Animals. https://www.nationalgeographic.com/animals/article/exotic-pets-become-invasive-species Sakai, A. K., Allendorf, F. W., Holt, J. S., Lodge, D. M., Molofsky, J., With, K. A., Baughman, S., Cabin, R. J., Cohen, J. E., Ellstrand, N. C., McCauley, D. E., O’Neil, P., Parker, I. M., Thompson, J. N., & Weller, S. G. (2001). The Population Biology of Invasive Species. Annual Review of Ecology and Systematics , 32(1), 305–332. https://doi.org/10.1146/annurev.ecolsys.32.081501.114037 Saunders, G. R., Gentle, M. N., & Dickman, C. R. (2010). The impacts and management of foxes ( Vulpes vulpes ) in Australia . Mammal review, 40(3), 181-211. Weber, L. (2013). Plants that miss the megafauna. Wildlife Australia, 50(3), 22–25. https://search.informit.org/doi/10.3316/ielapa.555395530308043 Williams, G. (2011). 100 Alien Invaders . In Google Books. Bradt Travel Guides. https://books.google.com.au/books?hl=en&lr=&id=qtS9TksHmOUC&oi=fnd&pg=PP1&dq=invasive+species+australia+bounty+ Wicked back to

Ever thought about whether we could build the Iron Man suit? We cannot replicate it exactly, but we can find some workarounds to build parts of it with currently available technology. With the exponential growth of technology, we are getting closer and closer to building the Iron Man suit. Cinema to Reality Can We Build the Iron Man Suit? By Manthila Ranatunga We see cool and fancy gadgets in movies every now and then. How can we bring them to reality? For this issue, we take a look at the Iron Man suit. Edited by Breana Galea, Ashleigh Hallinan & Tanya Kovacevic Issue 1: September 24, 2021 Illustration by Gemma Van der Hurk Warning: Iron Man (2008) spoilers When Marvel Studios released Iron Man in 2008, it was all the rage among comic book fans, film geeks and engineers alike. The Iron Man suit is one of the coolest and most iconic gadgets in film history. A generation of mechatronics engineers were inspired after watching Tony Stark build the suit, myself included. Now we wonder whether we could build it with today’s technology. So, the question remains: can we build the Iron Man suit? We are talking about the Mark III suit, the gold and hot-rod red one. Unfortunately, replicating the suit is impossible; the laws of physics would not allow it. However, we can make some compromises and find some workarounds to build the suit’s most defining systems. The Power Source We can all agree the most vital part of the suit is the power source. After all, it gave Mr Stark the idea for the suit. The suit is powered by an arc reactor, which is essentially a fusion reactor (1). These produce power using nuclear fusion, the same way the sun and stars burn as enormous balls of fire. We are talking about reactions between atoms which are the building blocks of everything. Atoms contain a cluster of even smaller particles inside. Collectively they form the nucleus, so you can see where nuclear fusion comes from. Now, where are we going with this? Well, when nuclear fusion occurs, heat energy is produced (2). Nuclear fusion was chosen as the suit’s power source due to the colossal amount of energy it produces. With the palm of your hand acting as a size guide, nuclear fusion is one of the highest energy density methods available. Sounds too good to be true, right? Correct. To replicate the conditions required, a reactor would need to be heated to 150 million degrees Celsius (3) - 10 times hotter than the sun’s core! Imagine that on your chest! Unsettling, to say the least. Mr Stark’s arc reactor is self-sustaining and can power the suit for hours, or even days. But with modern technology, fusion reactors consume more energy than they produce (4). Consequently, recreating an arc reactor of the same size and energy output is currently impossible. Nevertheless, there are workarounds to create a partially functioning arc reactor. Massachusetts Institute of Technology (MIT) has been working on a fusion reactor called the ‘Alcator C-Mod’ for the past 20 years (5). Their goal has been to reduce their size while maintaining power output. Typical fusion reactor size ranges from three to nine metres in diameter, but MIT has managed to reduce theirs to about one. Assuming fusion reactors are net-positive energy producing and well heat-insulated, we can assemble the Alcator C-Mod into our own arc reactor. There are many more factors that are too complicated for us and thus we will ignore them. Instead of being placed on the chest, it can be a giant backpack! The Flight System Now, why do we need so much power? Well, the flight system consumes the bulk of it, which leads to the next point. In the movie, Iron Man flies using the repulsors on his gloves and boots. They are not gas turbines like jet engines. The suit does not carry fuel – how could it? It does not have any storage compartments. The fuel must come from outside of the suit. Here is a hint: it is everywhere, yet invisible at the same time... Air! Helicopters fly by pushing air downwards with their rotors. This works according to Isaac Newton’s third law, which states that any force will have an equal and opposite reaction. By pushing air downwards, the helicopter goes upwards. Iron Man does not have a giant rotor, so how did he solve this? Get ready for another round of physics! Repulsors use muon beams to control flight as needed. Muons are particles smaller than atoms. They exist in the Earth’s upper atmosphere (6), but can also be created at large research facilities. For now, let us assume Mr Stark has a way to produce them on his own; remember, he is a billionaire! The muon beams are ignited using plasma made by the heating of air. To produce this on-demand, the suit draws power from the arc reactor for heating and the suction of air. The repulsor beams are then created, ready for flight! Muons have a short lifespan - about a millionth of a second. In real life, muon storage is not a viable option; they must be generated on the spot. Muon creation occurs in particle accelerators (7). These are long tubes for accelerating and making particles collide at high speeds. You may have heard of the Large Hadron Collider in Switzerland, a particle accelerator that is 27km long. Through efforts to miniaturise them, researchers at the SLAC National Accelerator Laboratory have designed one only 30 centimetres in size (8). Ignoring some laws of physics and with a few billion dollars, we can fabricate this into our own repulsors. Keep in mind - the suit’s hands and feet are smaller than 30 centimeters. Our gloves and boots will be longer and bulkier. The Future So there we have it - a semi-reasonable arc reactor and a flight system. Fun to explore the possibilities of current technology, right? But we must also consider the ethics of building such a deadly weapon. Yes - the Iron Man suit is a weapon. In the wrong hands, this technology would not be so exciting. Centuries or even decades from now, scientific breakthroughs may allow the replication of the suit. When that happens, as humans, it will be necessary to contemplate the moral consequences of such an advancement. Here we have only examined two principal systems of the suit. The rest is up to you! Traverse your mind and create your own semi-realistic Iron Man suit. As we saw here, the Iron Man suit is not far off from our time. Who knows what the future holds? References 1, 3, 4. Trevor English, “How Does Iron Man's Arc Reactor Work?” Interesting Engineering. Published June 26, 2020. https://interestingengineering.com/how-does-iron-mans-arc-reactor-work . 2. Matthew Lanctot, “DOE Explains...Nuclear Fusion Reactions.” U.S. Department of Energy. Accessed August 30, 2021. https://www.energy.gov/science/doe-explainsnuclear-fusion-reactions . 5. Earl Marmar, “Alcator C-Mod tokamak”. Plasma Science and Fusion Center - Massachusetts Institute of Technology. Accessed August 31, 2021. https://www.psfc.mit.edu/research/topics/alcator-c-mod-tokamak 6. Paul Kyberd, “How a ‘muon accelerator’ could unravel some of the universe’s greatest mysteries”. The Conversation. Published February 20, 2020. https://theconversation.com/how-a-muon-accelerator-could-unravel-some-of-the-universes-greatest-mysteries-131415 . 7. Seiichi Yamamoto, “First images of muon beams”. EurekAlert! Published February 3, 2021. https://www.eurekalert.org/news-releases/836969 . 8. Tibi Puiu, “Particle accelerator only 30cm in size is hundred times faster than LHC”. ZME Science. Published November 6, 2014. https://www.zmescience.com/science/physics/particle-accelerator-faster-lhc-5334/ .

By Reah Shetty < Back to Issue 3 Waving Hello to the Aliens By Reah Shetty 10 September 2022 Edited by Zhiyou Low and Ashleigh Hallinan Illustrated by Matt Duffy Next They arrived in a sea of indiscernible shapes, a massive looming body in the sky. We weren’t prepared. We never could have been. Our quest to uncover the unknown, our innate thirst for knowledge – this is humanity’s fatal flaw. We sent the invitation and they accepted it. In the serenity of Earth, with its blue skies and tranquillity, it was easy to convince ourselves we were invincible. If only we had known. *** Life beyond Earth is considered terrifying to some and exciting to others. It is a fascinating question that has plagued humanity for centuries - Do aliens exist? The idea of other – or extraterrestrial – life dates back to ancient times, with the 200AD fantasy novel Vera Historia describing alien lifeforms on the moon.1 Throughout the centuries, we see human imagination construct fantastical tales from humanoids being sent to Earth in the 10th century narrative The Tale of the Bamboo Cutter (1) to the first movie featuring aliens in 1902, A Trip to the Moon. (2) As we began pondering more about the possibility of aliens, we started connecting their existence with alien technology. During World War II, soldiers would see unknown airborne objects (3); these sightings kicked our curiosity into motion, laying the conceptual foundation of unidentified flying objects (UFOs). Belief in alien existence underwent rapid acceleration in 1947, marking a monumental turning point in the possibility of extraterrestrials. Kenneth Arnold, an American businessman and pilot, is largely credited with the first UFO sighting which newspapers described as “flying saucers”. (3) This catalysed a chain reaction of UFO appearances and the iconic images of UFOs as hovering disks. Later that same year, the first apparent tangible remnant of alien technology was discovered. Witnesses reported a large wreckage site at a New Mexico ranch, an event known as the ‘Roswell UFO Crash’. In the face of mass excitement and speculation, the army was quick to offer the explanation of a crashed weather balloon. However, in an interview years later, one of the officers who had attended the scene revealed they had been ordered to keep quiet. The US Air Force then released a statement saying the wreckage was actually from a classified project. (4) With all these mixed messages, it does lead us to wonder what really happened... Jumping forward to current times, the US government has officially recognised the existence of ‘Unidentified Aerial Phenomena’ (UAPs) (5) supplemented by recent puzzling aircraft footage of “pyramid-shaped objects” recorded by the Pentagon. (6) The government has approved the Unidentified Aerial Phenomena Task Force, a team whose mission is to “detect, analyse and catalog [unidentified aerial phenomena] that could potentially pose a threat to U.S. national security”. (3) With the government unable to provide an explanation and simultaneously confirming the veracity of UAPs, this reopens and supports the ever-intriguing notion that we are not alone. Our evolving comprehension of the solar system and universe corresponds with a growing fervour that we will indeed stumble upon extraterrestrial life. NASA believes Earth is only a small planet out of trillions in the Milky Way galaxy. (7) With so many unexplored and uncharted territories out there, many believe the odds of other living organisms existing are high. It is rather confounding to picture the centre of our lives as a mere tiny cog in the overarching mechanism that is the universe. But it is this grandeur and this vastness which should caution us against encroaching too far into space. Stephen Hawking, a renowned and respected physicist, publicly condemned this mission objective. He was very clear in his belief that aliens of some form do exist but that we should do absolutely everything we can to avoid contact with aliens. Hawking, articulate in his disapproval, paralleled that “if aliens visit us, the outcome would be much as when Columbus landed in America, which didn’t turn out well for the Native Americans”. (8) Yet in 1974, we began attempting to contact aliens by broadcasting the Arecibo message from Puerto Rico using radio waves. The project was decommissioned in 2020 following a partial collapse. There was no success in its goal of establishing communication. (9) Researchers are in the process of constructing a new updated message to make first contact. They are trying to send out Earth’s location to alien technology capable of receiving it in an attempt to establish a mutualistic relationship. Compared to the Arecibo attempt, not only has the message itself become more advanced but our understanding of the Milky Way Galaxy is more detailed enabling area-specific targeting. (9) The potential for success here demands our urgent attention. In recent years we have seen an influx of science fiction novels and films, many of which feature calamitous situations of hostile invading alien forces against mankind. We see The Avengers, The Matrix, Star Wars and countless others and we empathise with the characters. But the crucial point is that what is happening in those films could become our reality. If our signal is received, we are heading for a drastically different future – a time during which science fiction becomes science nonfiction. Considering this, should we be trying to communicate with aliens? We cannot begin to truly fathom what such a connection would lead to… be it beneficial or disastrous. References 1. Scharf C. The First Alien [Internet]. Scientific American Blog Network. 2019. Available from: https://blogs.scientificamerican.com/life-unbounded/the-first-alien/ 2. Monteil A. 50 best alien movies [Internet]. Stacker. 2020. Available from: https://stacker.com/stories/4458/50-best-alien-movies#:~:text=Aliens%20first%20appeared%20on%20screen,%E2%80%9Cufology%E2%80%9D%20emerged%2C%20leaving%20a 3. Wall M. UFOs and UAP: History, sightings and mysteries [Internet]. Space.com. 2021. Available from: https://www.space.com/ufos-uap-history-sightings-mysteries 4. Crookes D. Roswell UFO crash: What is the truth behind the 'flying saucer' incident? [Internet]. livescience.com. 2021. Available from: https://www.livescience.com/roswell-ufo-crash-what-really-happened.html 5. Bram C. UFOs exist, and might come from beyond Earth, the U.S. said. Will that encourage conspiracy theorists? [Internet]. The Washington Post. 2021. Available from: https://www.washingtonpost.com/politics/2021/07/30/ufos-exist-might-come-beyond-earth-us-said-will-that-encourage-conspiracy-theorists/ 6. Dockrill P. Pentagon Confirms 'Pyramid-Shaped' UFO Video Footage Is Authentic [Internet]. ScienceAlert. 2021. Available from: https://www.sciencealert.com/pentagon-confirms-pyramid-shaped-ufo-video-footage-is-authentic 7. Program P. Among Trillions of Planets, Are We 'Home Alone?' [Internet]. Exoplanet Exploration: Planets Beyond our Solar System. 2020. Available from: https://exoplanets.nasa.gov/news/1658/among-trillions-of-planets-are-we-home-alone/ 8. Jha A. Is Stephen Hawking right about aliens? [Internet]. The Guardian. 2010. Available from: https://www.theguardian.com/science/2010/apr/30/stephen-hawking-right-aliens 9. Pappas S. Is it time to send another message to intelligent aliens? Some scientists think so. [Internet]. livescience.com. 2022. Available from: https://www.livescience.com/new-seti-message Previous article Next article alien back to

Thinking of joining the OmniSci committee? We spoke to Aisyah, who incorporates her love for design into illustrations, events and social media at OmniSci, and shares her advice for those interested in getting involved (just do it!). Aisyah is a designer and Events Officer at OmniSci in her final year of a Bachelor of Science in geography. For Issue 4: Mirage, she is contributing to social media and as an illustrator. Meet OmniSci Designer & Committee Member Aisyah Mohammad Sulhanuddin Aisyah is a designer and Events Officer at OmniSci in her final year of a Bachelor of Science in geography. For Issue 4: Mirage, she is contributing to social media and as an illustrator interviewed by Caitlin Kane What are you studying? I am studying the Bachelor of Science in geography, now in my final year. Do you have any advice for younger students? It’s alright to not know what you’re doing. But on the flipside, if you do feel you know what you’re doing, be very aware that could change in the next few years. Always be open to new options. What first got you interested in science? When I was a kid, my parents encouraged me to ask questions about the world. I also had my own little book of inventions… if there was a problem somewhere, even if it was with the most outlandish invention, I would seek a way to solve that problem. That idea of being able to figure out how the world works is very fascinating to me. How did you get involved with OmniSci? During lockdown, I saw on the bulletin an expression of interest for a new magazine. I’d just entered uni, wanted to try everything and thought why not, it seems like such a great opportunity. And it is! What is your role at OmniSci? I’ve done a lot of graphic design and I’m going to return for this issue in that role. I’ve basically collaborated with writers to make art that looks good, goes with my style and can convey what they want to say in their article. I’m also in the committee for OmniSci, and have been since last year. Within that, I’ve put multiple hats on: I’ve enjoyed organising multiple events for the club, and helping out with social media. Social events have had a great turnout this year, which is awesome. A new year is always a new opportunity for more people to learn about the magazine. What is your favourite thing about contributing at OmniSci so far? I’ve really enjoyed the graphics side of things. I love creating and it’s really awesome to be able to put art to something text-based. It’s interpretation… You’re bound by what the article says and what the science says, but there is freedom within to express something. I definitely enjoy being able to put my creativity into promotion [as a committee member]. Doing it in a way that’s aesthetically pleasing—it matters to me when things look nice! Do you have any advice for people thinking of getting involved, especially more on the committee side? Yes—do it! Come and join… If you’re interested, feel free to come along because no role should be too daunting for you, and there is always opportunity to make the role fit how you want, it’s quite flexible. Can you give us a sneak peak of what you're working on this issue? If there’s a lot to come, maybe you can just tell us where you’re up to in the process. I’ll be working on the design and looking forward to collaborating with the writer as to how to convey their article properly. In the future, I’m looking forward to being able to create more content for OmniSci—really looking forward to that. What do you like doing in your spare time (when you're not contributing at OmniSci)? A range of things—I like to read, edit photos, do graphic design of random illustrations. I also crochet, do a bit of arts and crafts on the side, and take a whole lot of photos. Which chemical element would you name your firstborn child (or pet) after? Wait, let me pull up the periodic table! Let’s see… Neon. Feels like a great name for a child or an animal. Like calling your kid Jaz or Jet. It’s very snazzy! Do you have anything else you’d like to share with the OmniSci community? Stay looking on our Facebook page! Keep in touch and always keep on communicating, consuming and learning more about science, because that’s how the world progresses honestly. See Aisyah's designs Should We Protect Our Genetic Information? The Rise of The Planet of AI Maxing the Vax: why some countries are losing the COVID vaccination race What’s the forecast for smallholder farmers of Arabica coffee? The Ethics of Space Travel Space exploration in Antarctica The Mirage of Camouflage FINAL Big Bang to Black Holes: Illusionary Nature of Time

'Science is everywhere' Competition Submissions Scroll to view the submissions we received for National Science Week 2021! Lily Robinson, 20 Science is everywhere in our lives. As soon as you take a walk outside, you are immersed in it. This picture is of a dam at my family home at the end of a drought. The water was crystal clear and there were these amazing deep cracks in the mud. I decided to rotate the image upside down to symbolise the impact of the drought upending our lives and the bush around us. Rebecca André, 23 I captured this photograph on my Olympus OM-2 film camera while out on a lunchtime walk. At first I took no notice of this indistinct bunch of leaves but as I moved around them the sun caught my attention and I noticed the illuminated veins. This photgraph reminds me that the beauty of the natural world is all around us all the time, if only we are mindful to observe it. Through science and observation, the beauty of unseen worlds and intricate truths are revealed to us. Sajitha Biju, 36 Vivipary in papaya fruit: Viviparous germination is a type of seed germination seen in plants, where the seeds/embryo begin to develop before they detach from the parent plant. Viviparous germination is also seen in the mangrove Avicennia. Stephanie Tsang, 25 A photograph of a jellyfish pulsing through the cold waters of Port Philip Bay, Victoria. It has no brain nor heart. Science is spectacular and can be found submersed underwater. Cnidarians have been around for millions of years and later and are the common ancestors of many other creatures. The oldest fossils found date back to around 500 million years old. They are found all over the world following the ocean currents. Stephanie Tsang, 25 A photograph of a jellyfish pulsing through the cold waters of Port Philip Bay, Victoria. It has no brain nor heart. Science is spectacular and can be found submersed underwater. Cnidarians have been around for millions of years and later and are the common ancestors of many other creatures. The oldest fossils found date back to around 500 million years old. They are found all over the world following the ocean currents. Betty La, 24 I like to practise on this contraption of wood, metal and vibrating air almost every morning. My motor pattern for the music is set into motion, followed by eighty-eight felt-covered hammers acting as oddly-shaped springs, dancing along steel strings wound with copper. They are spurred on by levers of black and white. The sound is amplified from a wooden soundboard, which expands and contracts imperceptibly with the temperature of the room. Ella Banic, 19 I wish I could explain why I think science is everywhere, but it is too ubiquitous for me to comprehend. In my artwork I have been interested in the relationship between humans and nature, particularly in the liminality of experience. While I can’t really describe what science is or where to find it, in this piece I see science as a life force; which gives us direction and allows us to see above the surface. Sarah Wehbe, 18 This photo of a strawberry was taken with a magnifying glass to show the individual hairs and textured skin of the strawberry that you wouldn't normally notice. These fibrous hairs protect the fruit from insect damage and each of these yellow seeds contain the DNA to produce a whole new strawberry plant. Biological sciences are all around us in the foods that we eat. Junsheng He, 18 This photo of the Moon was taken on the 26th of May this year, the day when the total lunar eclipse took place. When we think of the Moon, it is always an image of a shining silverish sphere. Nevertheless, in this particular night, red light shines to the Moon when it is passing through the shadow of the Earth, turning it to the "Blood" Moon. It insinuates that even the seemingly ordered patterns, the forever rotating heavenly bodies, can change their property driven by the power of science. Minchi Gong, 20 Furry Buddy and Pumpkin: I’ve got a pumpkin from the market, and left it on my desk for a couple of weeks because I was too busy to cook it. One day I surprisingly found that there’re a bunch of furry moulds growing on its body, which successfully caught my eyes. Wow I never thought the mould can be so AESTHETIC! Seems like these little furry microorganisms are so keen to show their sense of presence and to express their interpretation of arts. Louie Minoza, 30 Here we witness the first moments of a new born calf. As it witnesses the warm glow of the setting sun for the first time, unconcerned on where the bright light is going. Taking in the textures and scents of the grass under its body. The feeling of fullness as it suckles on it’s mothers teat after instincts urges it to go against gravity. This new found freedom shall be utilized to embark and explore this world it was born in. Caitlin Kane, 20 Have you ever wondered how a clear sky becomes an electrically charged thunderstorm? Electric currents, like those that flow in our powerlines, are made by the movement of tiny charged particles called electrons. When operating safely within a house, electricity can light a bulb, keep a fridge chilly or charge a car. In the big woolly clouds above our heads, the movement of dust, ice and water can create a static electric charge, like when hair is rubbed with a balloon. Sachinthani Karunarathne, 28 years In the fall, you see trees having photogenic colours. Trees do this not for the beauty what we see but to conserve energy during winter. Because due to changes in the length of daylight and temperature, the leaves stop their food-making process (photosynthesis). So, chlorophyll pigment breaks down, the green colour disappears, and the yellow to orange colours become visible and give the leaves part of their fall splendour. Caelan Mitchell, 23 Copper is one of my favourite metals. It has a significant history, and it looks stunning. It looks even more stunning when you catch an everyday object stained by a rich patina — a complex of copper oxides formed by heat and air. I've never seen anything like this. Joanna Stubbs An Australian native Eucalypt growing for years next to an urban creek and bike path in inner city Melbourne. Scientific research is required in how anthropogenic climate change will affect specific tree species, and inform measures on how best to ensure their survival in a warming climate. Sachinthani Karunarathne, 28 Blood oranges may have a sinister-sounding name, but they’re just a natural mutation of standard oranges. This mutation led to the production of anthocyanins, which make not just blood oranges bright red but also blueberries blue. The flesh develops its characteristic maroon colour when the fruit develops with low temperatures during the night. The anthocyanin pigments continue accumulating in cold storage after harvest. Longer the fridge time redder they become! Sachini Pathirana, 28 A microscopic image of a cell? Nah it’s simple kitchen science. When you wash oily dishes, you will see oil droplets forming thin layers like this on water. This is because adhesive force between oil and water molecules is greater than cohesive force between oil molecules. So, the oil molecules do not mix with water molecules. As a result, oil spreads on the water surface forming a thin layer. Sachini Pathirana, 28 Kernel colour was used to unravel an odd phenomenon in non-Mendelian inheritance: transposons. Transposons are stretches of DNA that jump from place to place in the genome, and landing in the middle of a pigment gene would alter the colour of that cell. Barbara McClintock won a Nobel Prize for her discovery of these transposons. Even the regular white/yellow corn you find in supermarkets has made big genetic leaps. Yitao Gan, 21 The beauty of nature from the preys, harvesters and predators. Christian Theodosiou, 19 My entry shows a sapling in the foreground and a waterfall in the background, captured at midday in the Springbrook mountains of Queensland this year. I aimed to photograph the scene so that perspective gives the appearance that the young plant is being watered by the waterfall and I think that the forms of the leaf and the white foamy water are quite complementary. Even though this waterfall does not directly feed this plant, the fact of their shared environment draws a life-giving relationship between them anyway. Science is everywhere because we, like all complex or simple organisms, are situated within and sustained by infinite webs of interdependence. Whether biological or more molecular, all science everywhere is defined by both obvious relationships, and those that take more time, devotion and study to identify. Teck-Phui Chua, 22 A sapling is growing where an older tree once grew. However, upon closer inspection, the older tree never fully died; part of it was still alive which has allowed a sapling to sprout from its trunk. In a similar vein, science is everywhere and has always been, but what has changed is how much we understand as one generation passes their knowledge onto the next so new discoveries can be made. Additionally, the tree may have seemed dead, but there was still life in it. Whether we choose to act on strong scientific evidence or ignore it, the science will still be there. Sarah Wehbe, 18 Interactions between living organisms are everywhere and are the essence of life itself. This image illustrates the commensal relationship between algae and turtles. The turtle’s shell provides an ideal surface for the algae’s growth, and the turtle is completely unaffected by its presence. In fact, it may help turtles camouflage and hide from prey. This simple interaction between living organisms highlights the existence of science in every aspect of life. Grace Li, 22 Science is often overlooked as a form of art due to its ubiquity. However, a simple photograph can be the reminder needed that science is not only everywhere, but it is beautiful. For example, a photograph is the result of photons travelling from the sun, bouncing off objects, and landing on a camera's sensor. Similarly, these incredible macro-photographic patterns of a lamp is captured by photons travelling through optic fiber. Christina Evans, 43 The bee retrieves pollen from the prickly thistles & how it's all stored on its hind legs like saddlebags. Xuezhi Yang It is fascinating how science is present everywhere, oftentimes interacting with itself creating intricate and mesmerizing works of art. In my artwork, I attempted to capture the anatomy and essence of the Antelope Jackrabbit's ears as light rays penetrate through them. Without light, the delicate and daedal arteries and veins would have been otherwise invisible, tucked away in fur and cartilage. If we truly pay attention, art is found everywhere in science.

By Lily McCann Svante Pääbo: Talking to the Past By Lily McCann 23 March 2022 Edited by Caitlin Kane Illustrated by Quynh Anh Nguyen For a collection of numbers on a screen, the World Population Clock stirs a lot of emotions (1). Watch it tick on, recording a life, another life, a death, then more lives. The number — well past 8 billion now — reflects the extent of Homo sapiens’ conquest over the world. Evidence of our culture, with its complex language, society and infrastructure, is everywhere. But we seem to be the only earthly species to live in such a way, the only species to track our own numbers on a digital clock. We swarm the planet, all its continents and yet we are, essentially, alone. To challenge this isolation, scientists reach out in all directions, hoping for some kind of reflection that might shed light on who we are. Astronomers look to space; they probe the depths of the universe in search of life like our own. Others, like Svante Pääbo, look to the past. 300,000 years ago, when Homo sapiens first evolved, there was no paper, no writing, no human-like language with which to record stories, cultures, or day to day recounts. Scant traces of our ancestors are all that are left to tease us: fossilised footprints, makeshift tools, bones, grave sites. These markers are indecipherable whispers, slipping through in a hazy, broken form from a past era to our own. With a time machine or resurrection tool perhaps we could converse with the dead, but while these remain foreign to our current reality, how can we talk to the past? For Pääbo, the language of genetics is the key. Using the information carried in Palaeolithic bones, Pääbo has discovered links between present-day humans and prehistoric hominids that tell the story of our evolution and current condition. These incredible findings have earnt Pääbo the Nobel Prize for Physiology or Medicine in 2022 (2). Some of his most important achievements establishing the field of Paleogenomics include the full sequencing of the Neanderthal genome and the discovery of a whole new hominin species: the Denisovan (3, 4). But what fascinates me is his discovery of genetic interrelations between these prehistoric species and Homo sapiens themselves. Pääbo compared Neanderthal and Denisovan genetics to those of modern humans across the world. He discovered similarities and patterns that suggest a flow of genes took place between our ancestors and these hominid species: in other words, our predecessors mingled sexually with Neanderthals and Denisovans at some point in history, passing their genetics onto us as encoded evidence of this fact (5). Human genomes from Europe and Asia were most closely related to Neanderthal genomes, and Pääbo has shown 1-2% of modern non-African Homo sapiens genes are Neanderthal in origin (3). Similar patterns were observed for Denisovans, with the closest relation with modern humans from Pacific islands (6). This data exposes an intimacy between prehistoric hominids that challenges our idea of humans as a species confined to solitude. This conversation between genomes is not without implications for modern human physiology. When Homo sapiens moved into Eurasia, Denisovan and Neanderthal locals had already adapted to places in which Homo sapiens were mere tourists (7). Transfer of certain genes from local populations into the Homo sapiens line may have assisted in their survival. One example is a gene found in Denisovans that is important for survival at high altitudes and has been inherited by modern day Tibetans (8). Researching the discrepancies between modern and prehistoric genetics can thereby allow us to show the function and significance of these shared genes. It is hard to visualise the world in which Neanderthals and Homo sapiens first met. Did the scene play out as a peaceful interaction between two groups of equals? Perhaps it was more akin to the pattern of colonisation with which we are familiar in modern history. As the last species of our evolutionary branch, the Homo genus, we cannot now recreate such a meeting. However these prehistoric meetings played out, we now have evidence that Homo sapiens and local species of hominids in Eurasia communicated on the most intimate of levels. An optimist might argue that these groups of pre-humans shared a harmonious understanding that could be reproduced if humans find an analogous life form elsewhere in the future. Communication is a powerful tool after all, traversing species and millennia. Perhaps genetic insights into the past can remind us that we are not really as isolated as we might think. References Current world population [Internet]. Worldometer. 2023 [cited 2023Mar7]. Available from: https://www.worldometers.info/world-population/ Hedestam GK, Wedell A. The Nobel Prize in Physiology or Medicine 2022 [Internet]. NobelPrize.org. The Nobel Foundation; 2022 [cited 2023Mar7]. Available from: https://www.nobelprize.org/prizes/medicine/2022/advanced-information/ Green RE, Krause J, Briggs AW, Maricic T, Stenzel U, Kircher M, et al. A draft sequence of the Neandertal genome. Science. 2010May7;328(5979):710–22. Krause J, Fu Q, Good JM, Viola B, Shunkov MV, Derevianko AP, et al. The complete mitochondrial DNA genome of an unknown hominin from southern Siberia. Nature. 2010Mar24;464(7290):894–7. Villanea FA, Schraiber JG. Multiple episodes of interbreeding between Neanderthal and modern humans. Nature Ecology & Evolution. 2018May26;3(1):39–44. Reich D, Patterson N, Kircher M, Delfin F, Nandineni MR, Pugach I, et al. Denisova admixture and the first modern human dispersals into Southeast Asia and Oceania. The American Journal of Human Genetics. 2011Oct11;89(4):516–28. Rogers AR, Bohlender RJ, Huff CD. Early history of neanderthals and Denisovans. Proceedings of the National Academy of Sciences. 2017Jul7;114(37):9859–63. Huerta-Sánchez E, Jin X, Asan, Bianba Z, Peter BM, Vinckenbosch N, et al. Altitude adaptation in Tibetans caused by introgression of Denisovan-like DNA. Nature. 2014;512(7513):194–7. Previous article Next article