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The researchers counted over 100,000 neurons and over a billion connections between them within this small cube of brain tissue. To find all the neurons and reconstruct the neural network, researchers had to slice the mouse brain 25,000 times. The issue is Go back Facebook X (Twitter) WhatsApp LinkedIn Pinterest Copy link Can a human brain be linked to a computer? Last updated: 06/11/24 Published: 28/12/22 Scientists in the US have succeeded in mapping the three-dimensional structure of the network of neurons in one cubic millimetre of mouse brain- a feat that would require two petabytes of storage. The human brain contains approximately 100 billion neurons, which is one million times the number of neurons found in a cubic millimetre of mouse brain. The researchers counted over 100,000 neurons and over a billion connections between them within this small cube of brain tissue. To find all the neurons and reconstruct the neural network, researchers had to slice the mouse brain 25,000 times. The issue is that the amount of data to store would kill any single computer. Memory and experiences that would have defined people later would be lost if they tried to store their minds too early. Using a computer too late may result in the accumulation of a mind with dementia, which would not work so well. Human tissue would have to be cut into zillions of thin slices using techniques compatible with dying and cutting. Local electrical changes that travel down dendrites and axons allow neurons to communicate with one another. However, when reconstructing the 3D structure, this may not be possible. After we die, our brains undergo significant chemical and anatomical changes. At the age of 20, they begin to lose 85,000 neurons per day due to apoptosis, or programmed cell death. Many memories that would have shaped a person later would be lost if he or she tried to store their mind too early. There are numerous steps involved in developing a computer capable of storing and processing human-level intelligence. It may be impossible for an artificial intelligence to produce sensations and actions identical to those provided and produced by your biological body. Bots are susceptible to hacking and hardware failure. Connecting sensors to the AI's digital mind would also be difficult. Written by Jeevana Thavarajah Related articles: The evolution of AI / The wonders of the human brain / AI in genetic diagnoses

Facebook X (Twitter) WhatsApp LinkedIn Pinterest Copy link The bright future of smart bandages 06/03/25, 12:35 Last updated: Published: 19/09/23, 16:30 In wound care Although wounds may seem miscellaneous to the naked eye, they can pose a great threat to the healthcare system, by overburdening health services through infections. Thus, it is essential to navigate wound care thoroughly to reduce burden and increase patient quality of life. Wounds can be caused by an array of different reasons and pose such a great threat because of the limited ways we’ve had to treat them which has resulted in issues such as antibiotic resistance, allergic reactions and so on. In recent times to enable higher quality treatment, a new invention known as the “smart bandage” has been made which uses nothing but light-emitting diode (LED) at its disposal to promote wound healing! The smart bandage is wireless and uses ultraviolet C radiation light (UVC) to sterilise wounds and prevent the risk of infection. This in turn decreases the chances of nosocomial incidences as well as opening doors for disinfection other than antibiotics or chemical based methods. The smart bandage is embedded with light emitting diodes called LEDs which emit UVC wavelength around 265-285nm using a controller. The smart bandage operates by effectively manipulating UVC’s germicidal and antimicrobial properties. Researchers produced a coil which is inductive and flexible so that the technology would easily be inserted into conventional fabric bandages. Wireless power via magnetic resonance is used by the coil so that the UVC LED’s can be powered without batteries being used. A second coil wirelessly transmits power to the inductive coil via electrical mains so that the LED is continuously receiving power supply till the required bacteria in the wound are eradicated. Scientists tested this technology on pathogens like Pseudoalteromonas sp , which are bacteria associated with bloodstream infections, surgical areas as well as wounds. Once the bacteria were cultured and grown, UVC LEDs were exposed to the culture which in turn resulted in the decreased growth of bacterial cells and within six hours completed stopped their growth by causing DNA damage leading to apoptosis of the bacterial cells. Currently, many wound treatment protocols involve the use of antibiotics which over time can lead to antibiotic resistance, thus straining health services by increasing hospital stays. The use of UVC based bandages not only decreases the risk of these consequences but is also environmentally friendly due to its low operating cost and reusability. Figure 4 also demonstrates added advantages of this technology. Looking forward, the revolutionary ability of smart bandages is undeniable. Currently, there is ongoing research being conducted into integrating a monitoring device which also has the capacity to send live data to healthcare professionals regarding the wound being treated. However, the results from this study are still to be replicated and tested in clinical studies. Although these innovations exhibit much promise by providing more flexible and higher quality care for patients, it is still in its infancy. But, it cannot be left unstated that the power of LED’s is remarkable, not only in their ability to treat but also in being economically beneficial. Written by Irha Khalid Related article: Virtual reality in healthcare Project Gallery

How diseases start and spread, the body’s defence system, vaccines, policies, and public opinion: unravel the maze of infection and immunity with these articles. Immunology Articles How diseases start and spread, the body’s defence system, vaccines, policies, and public opinion: unravel the maze of infection and immunity with these articles. You may also like: Biology , Medicine , Neuroscience , Chemistry COVID-19 misconceptions Common misconceptions during the COVID-19 pandemic Glossary of COVID-19 terms Key terms used during the COVID-19 pandemic A vaccine for malaria? A new hope for a vaccine for malaria The world vs. the next pandemic Can we see it coming? What steps do we need to take? Are pandemics becoming more severe? Arguments for and against Natural substances And how they can tackle infectious diseases A treatment for HIV? Can the CRISPR-Cas9 system be used as a potential treatment? The mast cell Key cells in the immune system Origins of COVID -19 How COVID-19 caused a pandemic Mechanisms of pathogen invasion How pathogens avoid detection by the immune system Astronauts in space How does little gravity affect the immune system? Ageing and immunity Ageing and its association with immune decline

For this experiment, the gravitational acceleration was calculated by measuring the time period of a simple pendulum using three different experimental methods; methods 2 and 3 were more similar than method 1. This experiment is primarily for data analysis of the measurements taken of a simple pendulum oscillating freely to determine the acceleration due to gravity. Go back Facebook X (Twitter) WhatsApp LinkedIn Pinterest Copy link Outline of an investigation of the period of a single pendulum, and its relation to gravity Last updated: 13/11/24 Last updated: 26/01/23 For this experiment, the gravitational acceleration was calculated by measuring the time period of a simple pendulum using three different experimental methods; methods 2 and 3 were more similar than method 1. This experiment is primarily for data analysis of the measurements taken of a simple pendulum oscillating freely to determine the acceleration due to gravity. This experiment can be repeated but can be carried out in different viscous liquids to see how the extra damping force affects the time period of the oscillation and calculate the g value from it. This can be useful to know as then making pendulum watches to work, say in different environments (such as under water), will be easier to make. It has future implications in industries and/ or technologies that produce related devices. Overall, this experiment was flawed from the beginning from not correctly applying the small angle criteria (in methods 2 and 3). However, there was success for method 1. (Reduced from a full lab report) Written by Siam Sama Related article: Viscosity of castor oil experiment

In today's fast-paced and often overwhelming world, taking care of our mental well-being is more crucial than ever. In this article, we will explore practical strategies that can easily be incorporated into our day-to-day lives, allowing us to establish a solid foundation for our mental well-being and sustain it in the long run. Go Back Facebook X (Twitter) WhatsApp LinkedIn Pinterest Copy link Empowering your mental health journey with practical strategies Last updated: 30/01/25 Published: 18/05/23 In today's fast-paced and often overwhelming world, taking care of our mental well-being is more crucial than ever. In this article, we will explore practical strategies that can easily be incorporated into our day-to-day lives, allowing us to establish a solid foundation for our mental well-being and sustain it in the long run. 1. Embracing mindfulness Mindfulness is a powerful practice that helps us stay present, cultivate awareness, and manage stress. Imagine starting your day by dedicating a few minutes to mindful breathing or meditation, allowing yourself to set a calm and focused tone for the day. Engage in activities with a mindful mindset, whether it's taking a peaceful walk in nature, relishing a cup of tea, or fully immersing yourself in the present moment. 2. Exercise Physical activity is another essential self-care strategy that not only benefits our physical health but also plays a profound role in nurturing our mental well-being. Find an exercise routine that that brings you joy and that easily fits into your life. Whether it's walking, jogging, yoga, or any other form of movement that resonates with you, the key is to find something you enjoy and can stick to. Even small bursts of exercise throughout the day, like a short walk during your lunch break or opting for the stairs instead of the elevator, can make a significant difference in your overall well-being. 3. Sleep Hygiene Adequate sleep is vital for mental and emotional wellbeing. Establishing good sleep hygiene is crucial. Maintain a consistent sleep schedule by going to bed and waking up at the same time each day. Create a relaxing bedtime routine that signals to your body that it's time to unwind. Consider reading a book, taking a warm bath, or practicing gentle stretches to prepare your mind and body for restful sleep. Ensure your bedroom provides an optimal sleep environment by keeping it dark, quiet, and cool, and minimize exposure to screens before bed. 4. Online mental health platforms In our digital age, online mental health platforms have become invaluable resources for supporting our mental well-being. Platforms like Headspace , Better Help , and Calm offer a range of services, including meditation exercises, therapy sessions with licensed professionals, and stress reduction tools. Exploring these platforms can provide the support and guidance needed on your mental health journey. Self-care apps that can be installed on phones Prioritising self-care is essential for maintaining good mental health. By incorporating these practices into your daily routine, you can nurture your mind, body, and soul. By investing time and energy into yourself, you are fostering a stronger foundation for a happier and healthier life. Written by Viviana Greco Related articles: Stress and neurodegeneration / Physical and mental health

These articles range from astrophysics and space science to nuclear physics, harmonic motion, and thermodynamics. Physics Articles These articles range from astrophysics and space science to nuclear physics, harmonic motion, and thermodynamics. You may also like: Maths, Technology , Engineering The liquid viscosity of castor oil An experiment determining the liquid viscosity of castor oil using spheres Summary of a pendulum experiment An experiment on the pendulum and its relation to gravity Female Nobel Prize winners in physics Who were they and what did they achieve? The Northern Lights in the UK What determines the Northern Lights to be seen in your country? The James Webb Space Telescope And its significance in space exploration Geoengineering Will it work to save the environmental crisis? The Lyrids meteor shower What is it and when does it happen? Nuclear fusion Unleashing the power of the stars Colonising Planet Mars Which fuel would be used to colonise Mars? Superfluids And their incredibly slippery nature Total solar eclipses A description of them Mercury The closest planet to the Sun The DESI instrument DESI stands for the Dark Energy Spectroscopic Instrument Cumulus clouds How they form and their link to the weather Hubble Tension The cause of the Hubble Tension discrepancy is unknown Artemis The lunar south pole base A room-temperature superconductor? The search for one Physics in healthcare Incorporating nuclear medicine The Crab nebula In the constellation of Taurus The physics of LIGO LIGO stands for Laser Interferometer Gravitational-Wave Observatory Next

Beginning with the positives, there are reasons why future pandemics may be less serious compared to previous ones like the Spanish Flu (1918-1920), which killed approximately 500 million people or the Black Death (1346-1353), which eliminated half of Europe’s population. Go Back Facebook X (Twitter) WhatsApp LinkedIn Pinterest Copy link Are pandemics becoming less severe? Last updated: 13/11/24 Published: 25/04/23 Ever since the World Health Organisation (WHO) declared COVID-19 a pandemic in March 2020, many people have become more aware of future pandemics and best management strategies for these health disasters. For example, an online article from 2022 discussed ways to prepare for the next pandemic such as surveilling zoonotic diseases and planning for faster vaccine production; these can be effective in overcoming another pandemic in the future, though it is important to consider factors that may inhibit the above strategies aside from exacerbating future pandemics. With this said, this article will compare the reasons for pandemics becoming less severe and the reasons why they can become worse. Beginning with the positives, there are reasons why future pandemics may be less serious compared to previous ones like the Spanish Flu (1918-1920), which killed approximately 500 million people or the Black Death (1346-1353), which eliminated half of Europe’s population. Firstly, vaccinations reduced the spread of and prevented serious symptoms of many infectious diseases ranging from the eradicated smallpox to the seasonal influenza. Therefore, undermining the success of vaccines during pandemics is not ideal since this has negative consequences, mainly prolonging pandemics and killing more people. Secondly, there are antimicrobial treatments for a person infected with either a viral, bacterial, protozoal, or fungal infection. For instance during World War 2, penicillin has decreased bacterial pneumonia’s death rate from 18% to 1% in soldiers as well as saving 14% of the UK’s injured soldiers. Therefore, this event prevented bacterial spread and a potential pandemic that could have occurred without penicillin or other antibiotics. Another important treatment is for malaria. A review and meta analysis from Ethiopia showed that for artemether-lumefantrine in 10 studies involving 1179 patients, 96.7% did not have a fever and 98.5% did not have the malaria parasite after they were treated for 3 days. Again, artemether-lumefantrine with other antiparasitic drugs reduced the possibility of a malarial pandemic. Additionally, there are non-medical interventions that may decrease the severity of pandemics. For instance, a cross-panel analysis discovered that enforcing a lockdown during the COVID-19 pandemic saw new cases declining around 10 days after execution and this benefit grows after 20 days of the lockdown. Similarly, a review highlighted that social distancing of more than 1 metre between individuals led to reduced COVID-19 transmission risk by 5 times while the impact of protection two-fold for each extra 1 metre. Considering both of these methods, re-using them for future pandemics can reduce infectious disease spread in combination with vaccinations and antimicrobial drugs. On the other hand, it is crucial to consider the counter argument of why pandemics may worsen in the future. To illustrate, there is the possibility that diseases could resurge into more fatal variants similar to COVID-19, which lead to more deaths and vaccines becoming less effective. Alternatively, there may a current contagious pathogen that can combine with another one to form a new disease; this is how HIV/AIDS become virulent since the 1980s to present day as researchers uncovered that the virus collaborates with non-viral diseases like malaria and tuberculosis and viral diseases such as hepatitis C to harm/kill the patient. These instances can occur for viral pathogens along with other types (protists, bacteria and fungi). As for non-viral pathogens, it is likely that future pandemics originate from them with a review discussing bacteria like MRSA or ones causing water-borne and unsanitary food infections infecting humans and animals. It elaborated that multi-drug resistant bacteria would be arduous to destroy opposed to non-resistant ones, resulting in higher: mortalities, medical logistics, costs and hospitalisations. Going back to penicillin with other antibiotics, although it was used since World War 2 for bacterial infections, resistance towards them has exponentially increased whereby countless types of bacteria overpower their effects because antibiotics have been overprescribed and their use in agriculture has made bacteria stronger. Another reason to consider pandemics becoming worse is the counter-effectiveness of lockdowns. An article stated that comparing them between countries is insufficient because there is a lack of evidence for them tackling COVID-19 and the 1918-1920 Spanish Flu. Also, it found that it is expensive to enforce them and suggested a 20 fold death rate, indicating that a cost-benefit analysis is needed before utilising lockdowns to stop the spread of infectious diseases. Additionally, COVID-19 not only had detrimental impacts on health, it influenced non-health factors such as economics, culture and politics. For example, lots of Iranian people went to crowded places and business centres as the government did not have the finances during their lockdown to protect citizens from the virus. Overall, everyone should collaborate to prepare for the inevitability of future pandemics because historically, using a multitude of methods: lockdowns, vaccines, social distancing and antimicrobial drugs in order to minimise the time span and consequences of the pandemics. Referring back to deadliest pandemics from the past like the Black Death and Spanish Flu, it is our responsibility to prevent history from repeating itself. Written by Sam Jarada Related article: Rare zoonotic diseases REFERENCES Sridhar D. Five ways to prepare for the next pandemic. Nature. 2022 Oct 26;610(7933):S50–0. Jarus O. 20 of the worst epidemics and pandemics in history. livescience.com. 2020 Mar 3. Rayner C. How the discovery of penicillin has influenced modern medicine - The Oxford Scientist. The Oxford Scientist. 2020 June 1. Ayalew MB. Therapeutic efficacy of artemether-lumefantrine in the treatment of uncomplicated Plasmodium falciparum malaria in Ethiopia: a systematic review and meta-analysis. Infectious Diseases of Poverty. 2017 Nov 15;6(1). Alfano V, Ercolano S. The Efficacy of Lockdown Against COVID-19: A Cross-Country Panel Analysis. Applied Health Economics and Health Policy. 2020 Jun 3;18(4):509–17. Sun KS, Lau TSM, Yeoh EK, Chung VCH, Leung YS, Yam CHK, et al. Effectiveness of different types and levels of social distancing measures: a scoping review of global evidence from earlier stage of COVID-19 pandemic. BMJ Open. 2022 Apr 1;12(4):e053938. Singer M. Pathogen-pathogen interaction. Virulence. 2010;1(1):10–8. Salazar CB, Spencer P, Mohamad K, Jabeen A, Abdulmonem WA, Fernández N. Future pandemics might be caused by bacteria and not viruses: Recent advances in medical preventive practice. International Journal of Health Sciences. 2022;16(3):1–3. Ventola CL. The Antibiotic Resistance crisis: Part 1: Causes and Threats. P & T : a peer-rev10. Yanovskiy M, Socol Y. Are Lockdowns Effective in Managing Pandemics? International Journal of Environmental Research and Public Health. 2022 Jul 29;19(15):9295. Yoosefi Lebni J, Abbas J, Moradi F, Salahshoor MR, Chaboksavar F, Irandoost SF, et al. How the COVID-19 pandemic effected economic, social, political, and cultural factors: A lesson from Iran. International Journal of Social Psychiatry. 2020 Jul 2;67(3):002076402093998.

Resources specific to A-levels to help students with revision. A-levels Are you a student currently studying A-levels, or looking to choose them in the near future? Read below for tips and guidance! You may also like: IB resources , University prep and Extra resources What are A-levels? Jump to resources A-levels, short for Advanced Level qualifications, are a widely recognised and highly regarded educational program typically taken by students in the United Kingdom (UK) and some other countries. They are usually studied in the final two years of secondary education, typically between the ages of 16 and 18. A-levels offer students the opportunity to specialise in specific subjects of their choice. Students typically choose three or four subjects to study, although this may vary depending on the educational institution. The subjects available can be diverse, covering areas such as sciences, humanities, social sciences, languages, and arts. How are A-levels graded? The A-level grading system is based on a letter grade scale in the UK. Here's an overview of the A-level grading system: Grades: A* (pronounced "A-star"): The highest grade achievable, demonstrating exceptional performance. A: Excellent performance, indicating a strong understanding of the subject. B: Very good performance, showing a solid grasp of the subject. C: Good performance, representing a satisfactory level of understanding. D: Fair performance, indicating a basic understanding of the subject. E: Marginal performance, showing a limited understanding of the subject. U: Ungraded, indicating that the student did not meet the minimum requirements to receive a grade. What are the benefits of studying A-level? A-levels provide students with a variety of advantages, such as a solid academic foundation for further education, the chance to focus on interest-specific areas, and flexibility in planning their course of study. Transferable abilities like critical thinking, problem-solving, and independent research are developed in A-levels, improving both prospects for entrance to universities and future employment opportunities. These widely respected credentials encourage intellectual vigour, intellectual curiosity, and a love of lifelong study. A-levels provide students with a strong foundation for success in higher education and a variety of career pathways thanks to their academic rigour and global renown. Resources for revision Web sites to hel p Maths / Maths and Further Maths Chemistry / Chemrevise / Chemguide Biology / Quizzes Physics: A-level Physics / Isaac Physics Computer Science topic-by-topic Teach Computer Science Psychology All subjects / Seneca Learning / Save My Exams Physics and Maths Tutor YouTube channels to hel p Chemistry- Allery Chemistry and Eliot Rintoul Past p apers Biology, Chemistry, Physics, Maths Textbooks (depend on exam board) CGP range for Bio, Chem, Phys, and Maths- exam practice workbooks

Facebook X (Twitter) WhatsApp LinkedIn Pinterest Copy link Power of sisterhood in STEM Last updated: 28/03/25, 11:10 Published: 28/03/25, 08:00 Broadening access for (black) women in STEM In collaboration with SiSTEM for International Women's Month Entering a fluid dynamics lecture. Looking under a microscope confined to the four walls of a lab. Walking onto a construction site or a board meeting. As a woman in these spaces, particularly as a woman of colour it is easy to believe you are the ONLY one. That’s what we thought, two sisters of black heritage starting out in the biomedical and the engineering field respectively. The higher we went in education the less people that looked like us. Being 1 of 10 women in a cohort of 200 was a familiar sight. Being less than 2% of the engineering workforce as a woman, you can start to feel like science, technology, engineering and maths (STEM) is not for you. But the reality is there are women in STEM doing incredible work. STEM is not a man’s industry. As women, we deserve our space on the STEM table. Through our struggles and isolating experiences, we decided to create SiSTEM, a community for all these wonderful women. Real life sisterhood We are often asked how we find working with your sister. Truth is, we wouldn’t be each other’s first choice for a business partner! We never thought we would start an organisation together, growing up as most siblings we have always wanted to do our own thing. Science and engineering was always seen as us doing separate things. Moreover we have completely different personalities. But we are two sisters with one dream; we don’t want another girl to leave the STEM field because she doesn’t believe she belongs there. We don’t want another girl to disqualify herself from her STEM career or degree because she has been told she doesn’t have the look for STEM or grades to do well. We have one passion and that’s to change the narrative of women in STEM, particularly black women and those from lower socioeconomic backgrounds. There is power in numbers Community and having a support system are important. We wouldn’t have completed our STEM degrees or broken into our careers without our personal sisterly support. We were always a phone call away for each other, ready to be a listening ear and a cheerleader. That same sisterly support is what we offer to other women and girls through our initiative. There’s power in sisterhood, standing on the shoulders of great women. Women face unique challenges particularly in the STEM industry, discrimination, feeling less valued, difficulty with pay and promotion but by building a culture of support we empower women to thrive despite the barriers. It’s beautiful to belong to a circle of women as we are stronger together. By belonging to a community it cultivates a feeling of belonging. You also learn from one another, sparking interesting conversations, building important connections. We learn from our community everyday: the conversations we are able to have inspire us and broaden our knowledge. Throwing the rope to the next generation From its inception, SiSTEM’s goal was to support women and girls throughout their STEM journey. The gender gap issue in STEM starts very early on, very often not when we choose our degree courses but as early as primary school. That’s why we empower young girls as young as five years old. Every girl, every woman deserves to be part of a community. Every stage of the journey has its unique challenges which belonging to community can help navigate. I’m sure you’ve heard the saying ‘empowered women empower women’ - now we feel empowered to empower other girls and women. We originally felt like we were not the people to create this community. Imposter syndrome told us we weren’t qualified enough, that we didn’t have a story to tell worth listening to. Reflecting on our own journeys, it’s women like our teachers, our mother, our friends who have been key in our success. Our mum telling us to ‘aim high and be the best’, a female science teacher telling us ‘you can be whatever you want to be’, a friend's comment on our graduation post saying how proud they are. And now a community of women who we can lean on for support, receive advice and inspire us every day. Today, we meet women at schools, events, universities and workplaces. A common theme in some of these women and girls we meet is a lack of confidence. Our biggest joy is when we are able to put a smile on a young girl’s face who feels giving up.Women need reminding how amazing they are so we continue to do amazing things, find a cure for cancer, make an innovative product to solve the world’s biggest problems or to design a beautiful building which would will be seen by generations to come. We shouldn’t be afraid to share our personal stories of how we got to where we are. when others hear they are empowered. This is what we use our platform to do. We are able to pass on the mic to other woman to share their untold stories. By putting a light on various women particularly black women in STEM we are giving others positive roles models to look to where they able to believe they do can do it. An empowered woman is a force of nature. She shines. She encourages. She breaks barriers and has the confidence to speak up in a place where she was told to be silent. By forming our community even though we may still find that we are the only women in the room, we have many women standing behind us and many more coming. Conclusion Retention of women in STEM is as equally as important as getting women into STEM. There is a leaky pipeline particularly between university level and STEM leadership positions and also many young girls already have a negative perception about certain STEM careers. That’s why we created an initiative to encourage more girls to get into STEM through innovative workshops and outreach programs and to create a community for women currently in the field. By doing so we aim to open the bottle top at one end and close any holes at the other end. Women supporting women in a powerful thing and there is space for all women in stem, no matter your background, academic records or skin colour. Together we make STEM colourful…preferably pink! -- Scientia News wholeheartedly thanks SiSTEM for this important piece on female representation in STEM. We hope you enjoyed reading this International Women's Month Special piece! For more information, check them out on Instagram and LinkedIn . -- Related articles: Representation in STEM / Women leading in biomedical engineering / African-American women in cancer research Project Gallery

Facebook X (Twitter) WhatsApp LinkedIn Pinterest Copy link Story of the atom 11/02/25, 12:23 Last updated: Published: 20/04/24, 11:16 From the Big Bang to the current model The Greek philosopher and physicist Democritus proposed the idea of an atom at around 440 B.C. The atom is first explained by him using a stone. When a stone is split in half, it becomes two separate stones. There would eventually come to be a portion of the stone that would be too small to be cut if it were to be cut continuously i.e., indivisible. Since then, many scientists have adopted, discarded, or published their own theories about the nature, structure, and size of atoms. However, the most widely accepted, and still the basic model used to study atoms is Rutherford’s model. Rutherford published his theory of the atom suggesting that it had an electron orbiting a positively charged nucleus. This model was created after a series of experiments which included shooting alpha particles at thin gold sheets. Most of the alpha particles flowed through with little disturbance, but a tiny fraction was scattered at extreme angles to their initial direction of motion. Rutherford calculated the estimated size of the gold atom's nucleus and discovered that it was at least 10,000 times smaller than the atom's total size, with a large portion of the atom made up of empty space. This theory paved the way to further the atomic models by various other scientists. (Figure 1) Researchers have discovered unidentified molecules in space which are believed to be the precursor of all chemistry in the universe. The earliest "atoms" in the cosmos were actually nuclei without any electrons. The universe was incredibly hot and dense in the earliest seconds following the Big Bang. The quarks and electrons that make up matter first appeared when the cosmos cooled, and the ideal conditions were met for them to do so. Protons and neutrons were created by quarks aggregating a few millionths of a second later. These protons and neutrons joined to form nuclei in a matter of minutes. (Figure 2) Things started to happen more slowly as the cosmos cooled and expanded. The first atoms were formed 380,000 years ago when electrons were locked into orbits around nuclei. These were mostly hydrogen and helium, which are still the elements that are found in the universe in the greatest quantities. Even now, the most basic nucleus, found in ordinary hydrogen, is only a single, unadorned proton. There were other configurations of protons and neutrons that also developed, but since the number of protons in an atom determines its identity, all these other conglomerations were essentially just variations of hydrogen, helium, and lithium traces. To say that this is an exciting time for astrochemistry is an understatement. Furthermore, the formation mechanism of amino acids and nucleobases is being demonstrated by laboratory simulations of interstellar environments. Now that we are finding answers to these known problems, even more are arising. Hopefully, a more thorough understanding of these chemical processes will enable us to make more precise deductions about the general history of the universe and astrophysics. Written by Navnidhi Sharma REFERENCES CERN (n.d.). The early universe. [online] CERN. Available at: https://home.cern/science/physics/earlyuniverse#:~:text=As%20the%20universe%20continued%20to . Compound Interest (2016). The History of the Atom – Theories and Models | Compound Interest. [online] Compound Interest. Available at: https://www.compoundchem.com/2016/10/13/atomicmodels/ . Fortenberry, R.C. (2020). The First Molecule in the Universe. Scientific American. [online] doi: https://doi.org/10.1038/scientificamerican0220-58 . Sharp, T. (2017). What is an Atom? [online] Live Science. Available at: https://www.livescience.com/37206-atom-definition.html . Project Gallery