List of All Articles with Tag 'science and tech'

The meaning of life is the ultimate mystery – why do we exist? And is there a point to… well… anything? These are questions to which we may never find answers, but at least we can define what “life” means in scientific terms. And yet, our understanding of what life is is changing all the time, thanks to space exploration. As scientists continue to hunt for life beyond our own world, biologists are having to rethink the meaning of the word “life” itself. Sign up for our free Indy100 weekly newsletter Generally, biologists explain “life” as connoting a self-sustaining chemical system which is capable of performing functions such as eating, metabolising, excreting, breathing, moving, growing, reproducing, and responding to external stimuli. This definition works pretty well here on Earth (although there are some important exceptions, such as viruses), but experts have pointed out that if life exists elsewhere in the universe, it may not display the same properties that we’re used to. Indeed, it might be unrecognisable as life as we know it (forget those little green men). In which case, how will we spot it if it ever crosses our path? Astrobiologist Sara Imari Walker and chemist Lee Cronin think they’ve come up with a solution. The pair are now arguing that highly complex molecules found in all living creatures can’t exist thanks purely to chance. Therefore, they say, the universe must have a way of creating and reproducing complex information and retaining a “memory” of all of this.. In an interview with New Scientist, Walker, of Arizona State University, explained their radical idea on how objects come into existence. The concept, known as Assembly Theory, explains why certain complex objects have become more abundant than others by considering their histories. If the theory proves correct, it will redefine what we mean by “living” things and show that we’ve been going about the search for extraterrestrial life all wrong. In the process, we could even end up creating alien life in a laboratory, she stressed. In her discussion with New Scientist, Walker pointed out: "An electron can be made anywhere in the universe and has no history. You are also a fundamental object, but with a lot of historical dependency. You might want to cite your age counting back to when you were born, but parts of you are billions of years older. "From this perspective, we should think of ourselves as lineages of propagating information that temporarily finds itself aggregated in an individual." Assembly theory predicts that molecules produced by biological processes must be more complex than those produced by non-biological processes, as Science Alert notes. To test this, Walker and her team analysed a range of organic and inorganic compounds from around the world and outer space, including E. coli bacteria, urine, meteorites and even home-brewed beer. They then smashed up the compounds into smaller pieces and used mass spectrometry to pinpoint their molecular building blocks. They calculated that the smallest number of steps required to reassemble each compound from these building blocks was 15. And whilst some compounds from living systems needed fewer than 15 assembly steps, no inorganic compounds made it above this threshold. "Our system … allows us to search the universe agnostically for evidence of what life does rather than attempting to define what life is," Walker, Cronin, and others wrote in a 2021 Nature Communications article. The handy thing about this building block system – which they’ve dubbed the “'molecular assembly index” – is that it doesn’t rely on carbon-based organic materials to be identified. In other words, an alien could be made of entirely different stuff entirely and we’d still be able to spot it as life using the index. It also works regardless of what stage of “life” an extraterrestrial being is in – whether it is still in its infancy or has moved into a technological stage beyond our understanding. That’s because all of these states produce complex molecules which couldn’t exist in the absence of a living system. If all of this is hurting your head, let’s just get back to the basics: if there is a secret to life, it might all be down to what we do, not what we are. Have your say in our news democracy. Click the upvote icon at the top of the page to help raise this article through the indy100 rankings.

New findings have suggested that adding sensors to supermarket trolleys could save people’s lives. Scientists investigated whether installing electrocardiogram (ECG) sensors – designed to check the heart’s rhythm – on the handles of supermarket, trolleys could identify shoppers with atrial fibrillation, which causes an irregular and often abnormally fast heart rate. The sensors would detect heart conditions that put them at increased risk of stroke. The researchers said that over the course of two months, they identified 39 people who were unaware that they had the condition. Ian Jones, professor of cardiovascular nursing at Liverpool John Moores University, who led the study, said: “That’s 39 people at greater risk of stroke who received a cardiologist appointment.” He added: “This study shows the potential of taking health checks to the masses without disrupting daily routines.” It is estimated that around 1.5 million people in the UK have atrial fibrillation, contributing to one in five strokes. The condition is treatable, but at least another 270,000 people in the UK remain undiagnosed and unaware, according to the British Heart Foundation. Sign up for our free Indy100 weekly newsletter There are wearable devices that can also spot irregular heartbeat but this would also require people to take responsibility and wear the device. Professor Jones said: “Nearly two-thirds of the shoppers we approached were happy to use a trolley, and the vast majority of those who declined were in a rush rather than wary of being monitored. “This shows that the concept is acceptable to most people and worth testing in a larger study.” He added: “Checking for atrial fibrillation while people do their regular shopping holds promise for preventing strokes and saving lives. “A crucial aspect is providing immediate access to a health professional who can explain the findings and refer patients on for confirmatory tests and medication if needed.” The findings were presented at ACNAP 2023 conference organised by the European Society of Cardiology (ESC). Have your say in our news democracy. Click the upvote icon at the top of the page to help raise this article through the indy100 rankings.

Reusable water bottles tick many boxes. Not only do they help you stay hydrated and help save money, but they also help cut down on single-use plastic. They've almost become a fashion accessory, with chic stainless steel flasks and viral bottles going viral across TikTok. Sign up for our free Indy100 weekly newsletter Trying to hit the NHS-recommended eight glasses of water a day for adults is an excellent idea, of course, but did you know there’s one way your refillable bottle could potentially be detrimental to your health? According to a study from waterfilterguru.com, reusable water bottles contain an average of 20.8m colony-forming units (CFUs) of bacteria, which equates to 40,000 times more than the microbes on a toilet seat. So what might be the consequences if you continuously sip and refill without washing your bottle properly between uses? We asked health experts to talk through the risks… Bottling up bacteria “A common misconception when it comes to reusable water bottle hygiene is that as you’re typically filling it with pure water and it’s only coming into contact with your own mouth, there’s little need to clean it often,” says Dr Donald Grant, senior clinician at The Independent Pharmacy. However, every time you drink from the bottle, you’re transferring bacteria from your mouth, which can then multiply in the container. “Anything that is reusable can be prone to accumulating dirt, dust or debris and, as a result, bacteria,” says private GP Dr Suhail Hussain. “This is exacerbated by the fact water bottles are the ideal environment for harbouring bacteria due to being moist.” Hard-to-reach crevices – for example, inside a screw top or under a flip-up straw – could also develop mould, and then there’s contamination from other sources. “When you store it in a gym bag, for instance, it can pick up bacteria from the interior of the bag or anything else stored in it, while you can also transfer bacteria from your hands to your bottle,” says Grant. “If your bottle has a valve cap, you may need to lift or twist it with your fingers, and this can transfer bacteria you may have picked up from touching other objects or surfaces.” What types of microbes are found in water bottles? “These might be simple commensals such as streptococcus and staphylococcus, which normally live in symbiosis with their host (i.e. us) but can become problematic if they accumulate or the individual is under the weather,” Hussain says. “Bacteria such as E. coli – a common cause of urine and bowel infections – can often colonise the water bottle following repeated handling, such as taking the cap on and off.” These bacteria can potentially cause a variety of issues. “You may become sick and develop gastric illness, such as diarrhoea or vomiting,” Hussain continues. “Gram negative rods – another common bacterium found in unwashed bottles – can lead to urogenital tract infections and pneumonia.” Grant warns: “If there’s a build-up of mould inside the bottle, this can cause allergy symptoms, such as a runny nose, sneezing, or red and itchy eyes. Symptoms might be more severe for someone with asthma.” How often should you wash your reusable water bottle? “To minimise your risk of getting sick, you should ideally clean your water bottle after each use,” Grant says. “As a minimum, you should aim to wash it thoroughly at least a few times a week.” Hot water and washing up liquid are all you need to banish bacteria on a daily. “Fill the bottle with hot soapy mixture and swill around, or leave to soak in a detergent mixture,” Hussain advises. “Remember to pay special attention to lids/caps and screw top regions – use a clean brush [to scrub them].” If you’ve neglected your bottle for a few days and it needs a deeper clean, Grant suggests: “Soak your bottle overnight in a solution of half vinegar and half water. Rinse the bottle and let it dry fully before using it again.” Storage is also important to help minimise nasty microbes. “Where possible, you should keep your water bottle out of germ-rich environments such as your gym locker or sports bag,” Grant says. “You should also avoid filling your bottle with anything other than water, such as protein shakes, energy drinks, or sugar-rich liquids, as sugar can stimulate the growth of bacteria.” Hussain adds: “Don’t leave a water bottle in the sun for long periods or sitting in the cup holder in the car – the mixture of warmth and moisture is likely to make bacterial overgrowth worse.” Have your say in our news democracy. Click the upvote icon at the top of the page to help raise this article through the indy100 rankings.

Scientists have just created an entirely new state of matter made out of subatomic particles. The bosonic correlated insulator, to be precise, is both a new material and a new state of matter, said researchers from California, Arizona and Japan. There are four fundamental states of matter, liquid, solid, gas and plasma – an electrically charged gas found in situations like stars and lightning strikes. But there are many others when you drill down to quantum level (that means at an atomic and subatomic level). The scientists said this is a new one. Sign up to our free Indy100 weekly newsletter The new material is a lattice-shaped pattern, formed from a layer of the two different types of subatomic particles: bosons and fermions. Bosons are a type of particle which is difficult for scientists to create and manipulate because they do not interact with each other. Fermions are more stable – particles such as electrons – and interact through electrostatic force. The material sees the two different types of particle combining and interacting in a new way, with the particles eventually form into a crystalline state, which in turn creates a material which has an insulating effect. “Conventionally, people have spent most of their efforts to understand what happens when you put many fermions together,” says condensed matter physicist Chenhao Jin from the University of California, Santa Barbara (UCSB). “The main thrust of our work is that we basically made a new material out of interacting bosons.” The new material doesn’t yet have any practical uses, but exotic creations like this help scientists understand how the universe is put together, the team said. “What happened here is that we discovered the correlation that drove the bosons into a highly ordered state,” said physicist Richen Xiong, from UCSB. The scientists think the discovery could lead to them finding more materials like this further down the line. “We know that some materials have very bizarre properties,” said Xiong. “And one goal of condensed matter physics is to understand why they have these rich properties and find ways to make these behaviours come out more reliably.” Have your say in our news democracy. Click the upvote icon at the top of the page to help raise this article through the indy100 rankings.

Research from the University of Vermont suggests that there may be a link between those who have blue eyes and alcoholism. The study, conducted in 2015, was led by Dr Arvis Sulovari and assistant professor Dawei Li, and was the first to draw a direct connection between the colour of someone's eyes and their risk of developing alcoholism. Professor Li generated a database comprising of more than 10,000 individuals who have received a diagnosis for at least one psychiatric illness, including conditions such as addiction. Speaking of the conditions, Li - an expert in microbiology and molecular genetics - explained that they were "complex disorders" and that "many genes" and "environmental triggers" were involved. Sign up to our free Indy100 weekly newsletter The researchers used the database to identify those with a dependency on alcohol and discovered an interesting correlation. They found that those with lighter colour eyes - especially blue - had greater rates of alcohol addiction. The researchers even checked three times to be sure of their findings. "This suggests an intriguing possibility that eye colour can be useful in the clinic for alcohol dependence diagnosis," said Dr Sulovari. The study also found that the genetic components that determine eye colour and those associated with excessive alcohol use share the same chromosome. However, more tests and studies are going to have to take place in order for us to gain a deeper understanding of the potential link between eye colour and higher rates of alcohol dependency. Researchers are still unsure as to why there is such a link. With professor Li saying that much of genetics is "still unknown". Have your say in our news democracy. Click the upvote icon at the top of the page to help raise this article through the indy100 rankings.

If you found water that was more than two billion years old, would your first instinct be to drink it? One scientist did exactly that after finding the oldest water ever discovered on the planet. A team from the University of Toronto, led by Professor Barbara Sherwood Lollar, came across an incredible find while studying a Canadian mine in 2016. Tests showed that the water source they unearthed was between 1.5 billion and 2.64 billion years old. Given that it was completely isolated, it marked the oldest ever found on Earth. Sign up to our free Indy100 weekly newsletter Remarkably, the tests also uncovered that there was once life present in the water. Speaking to BBC News, professor Sherwood Lollar said: “When people think about this water they assume it must be some tiny amount of water trapped within the rock. “But in fact it’s very much bubbling right up out at you. These things are flowing at rates of litres per minute – the volume of the water is much larger than anyone anticipated.” Discussing the presence of life in the water, Sherwood Lollar added: “By looking at the sulphate in the water, we were able to see a fingerprint that’s indicative of the presence of life. And we were able to indicate that the signal we are seeing in the fluids has to have been produced by microbiology - and most importantly has to have been produced over a very long time scale. “The microbes that produced this signature couldn’t have done it overnight. This has to be an indication that organisms have been present in these fluids on a geological timescale.” The professor also revealed that she tried the water for herself – but how did it taste? “If you’re a geologist who works with rocks, you’ve probably licked a lot of rocks,” Sherwood Lollar told CNN. She revealed that the water was "very salty and bitter" and "much saltier than seawater." Have your say in our news democracy. Click the upvote icon at the top of the page to help raise this article through the indy100 rankings.

If you found water that was more than two billion years old, would your first instinct be to drink it? One scientist did exactly that after finding the oldest water ever discovered on the planet. A team from the University of Toronto, led by Professor Barbara Sherwood Lollar, came across an incredible find while studying a Canadian mine in 2016. Tests showed that the water source they unearthed was between 1.5 billion and 2.64 billion years old. Given that it was completely isolated, it marked the oldest ever found on Earth. Sign up to our free Indy100 weekly newsletter Remarkably, the tests also uncovered that there was once life present in the water. Speaking to BBC News, professor Sherwood Lollar said: “When people think about this water they assume it must be some tiny amount of water trapped within the rock. “But in fact it’s very much bubbling right up out at you. These things are flowing at rates of litres per minute – the volume of the water is much larger than anyone anticipated.” Discussing the presence of life in the water, Sherwood Lollar added: “By looking at the sulphate in the water, we were able to see a fingerprint that’s indicative of the presence of life. And we were able to indicate that the signal we are seeing in the fluids has to have been produced by microbiology - and most importantly has to have been produced over a very long time scale. “The microbes that produced this signature couldn’t have done it overnight. This has to be an indication that organisms have been present in these fluids on a geological timescale.” The professor also revealed that she tried the water for herself – but how did it taste? “If you’re a geologist who works with rocks, you’ve probably licked a lot of rocks,” Sherwood Lollar told CNN. She revealed that the water was "very salty and bitter" and "much saltier than seawater." Have your say in our news democracy. Click the upvote icon at the top of the page to help raise this article through the indy100 rankings.

Scientists have created a model human embryo to study the first weeks of life, complete with a heartbeat and traces of blood. The synthetic embryo was created with human stem cells and did not require sperm, eggs or fertilisation. It mimics the structure that occurs during the first month of pregnancy. Yet, scientists ensured it was designed to not form a foetus. Researchers involved in the extraordinary project discovered that the model had early stages of developing a brain and beating heart cells, which generally develop after 23 days in a human embryo. It was achieved through embryonic stem cells, which are 'blank' cells from a human embryo. Scientists grew the model in a lab before transferring it to a rotating bottle to act as an artificial uterus, The Guardian reported. Sign up for our free Indy100 weekly newsletter Scientists hope the findings will help them understand more about the impact of genetic disorders and miscarriage. Dr Jitesh Neupane, of the University of Cambridge’s Gurdon Institute, told the publication: "I randomly took my plate under the microscope and when I saw the [heartbeat] for the first time I was scared, honestly. I had to look down and look back again. "It was overwhelming for me. People get emotional when you see the heartbeat." He went on to emphasise that the model is "neither embryos nor are [they] trying to make embryos actually." "They are just models that could be used to look into specific aspects of human development," he continued. The findings are yet to be published in either a preprint or a journal paper. Have your say in our news democracy. Click the upvote icon at the top of the page to help raise this article through the indy100 rankings.

It sounds like something straight out of a Christopher Nolan film, but scientists have suggested that there could actually be an 'anti-universe' where time runs backwards. And if you’re anything like us, your brain is probably starting to hurt already. It comes from experts studying symmetries, and the new research is all to do with the fundamentals of symmetry in nature – the most significant of which are charge, parity and time. Bear with us… According to LiveScience, a new paper recently accepted for publication in the journal Annals of Physics suggests that there is a combined symmetry to the entire universe. Sign up to our new free Indy100 weekly newsletter As the research attests, the early universe was so uniform that time looks symmetric going backwards and forwards. The paper argues that the way we understand the world and wider universe around us, moving forwards in time, must also be expanded to include a mirrored version which runs backwards in time. It could also provide a deeper understanding of dark matter, too. The theory suggests that it is an invisible particle which only interacts via gravity and provides a pairing to the electron-neutrino, muon-neutrino and tau-neutrino. The research suggests that the conditions in a mirrored universe where time runs backwards would be full of these paired neutrinos, which would account for dark matter. Of course, we’d never be able to experience time running backwards even if it did definitely exist, but it’s a pretty cool theory none-the-less. It comes after Elon Musk made headlines in the world of science and space travel, after giving his estimation for when humans will land on Mars for the first time. The first moon landing famously took place in 1969, but space enthusiasts have been debating when they think the first Mars landing will be – now, the SpaceX CEO thinks we’ll be up there by 2029. Have your say in our news democracy. Click the upvote icon at the top of the page to help raise this article through the indy100 rankings.

Research has been revealed that shows which day of the week heart attacks are most likely to take place. According to a new study, the most severe types of heart attacks are more common on Mondays than any other day. STEMI attacks are the most severe forms of attacks, which are caused by a blockage of the coronary artery and see an interruption to the blood supply. A total of 10,528 patients were analysed as part of new research, with the study focusing hospital cases in Ireland and Northern Ireland between 2013 and 2018. Sign up to our free Indy100 weekly newsletter The findings were presented at the British Cardiovascular Society (BCS) conference in Manchester. The data shows that the risk of an STEMI-type heart attack were 13 per cent greater on a Monday compared to the average of other days. Cardiologist Jack Laffan from the Belfast Health and Social Care Trust said at the conference: "We've found a strong statistical correlation between the start of the working week and the incidence of STEMI. This has been described before but remains a curiosity." Laffan also considers it likely that the natural cycle of weeks, months and seasons has on our health. He said: "Based on what we know from previous studies, it is reasonable to presume a circadian element". Nilesh Samani, medical director at the British Heart Foundation, added: "This study adds to evidence around the timing of particularly serious heart attacks, but we now need to unpick what it is about certain days of the week that makes them more likely. "Doing so could help doctors better understand this deadly condition so we can save more lives in future." It comes after a woman revealed how when she was a teenager she mistook a heart attack for butterflies, after dancing with a boy for the first time. Have your say in our news democracy. Click the upvote icon at the top of the page to help raise this article through the indy100 rankings.

It’s not often that a single scientific discovery manages to change the way we think about the entire history of humanity. An ancient footprint has been newly uncovered, and it turns out that humans were walking around 30,000 years earlier than we previously thought. Two-legged homo sapiens were living in South Africa, it’s been proven, following the discovery of a 153,000 year old track. It was found in the Garden Route National Park near the coastal town of Knysna on the Cape South Coast. Sign up to our free Indy100 weekly newsletter The footmarks outdate the oldest previous discoveries, with the previous oldest found in nearby areas dated at 124,000 years old. The discoveries were made possible thanks to the optically-stimulated luminescence dating method, which analyses how long it’s been since a grain of sand has been exposed to sunlight. Researchers Charles Helm of Nelson Mandela University and the University of Leicester's Andrew Carr wrote in the Conversation: "In 2023, the situation is very different. It appears that people were not looking hard enough or were not looking in the right places. "Today, the African tally for dated hominin ichnosites (a term that includes both tracks and other traces) older than 50,000 years stands at 14. "Given that relatively few skeletal hominin remains have been found on the Cape coast, the traces left by our human ancestors as they moved about ancient landscapes are a useful way to complement and enhance our understanding of ancient hominins in Africa." The scientists involved believe that the area could be home to many illuminating discoveries given the makeup of the soil. They wrote: "We suspect that further hominin ichnosites are waiting to be discovered on the Cape South Coast and elsewhere on the coast. "The search also needs to be extended to older deposits in the region, ranging in age from 400,000 years to more than 2 million years. "A decade from now, we expect the list of ancient hominin ichnosites to be a lot longer than it is at present – and that scientists will be able to learn a great deal more about our ancient ancestors and the landscapes they occupied." Have your say in our news democracy. Click the upvote icon at the top of the page to help raise this article through the indy100 rankings.

Ever wondered how water first arrived on our planet? Well, it turns out the mystery could finally have been solved. Researchers have undertaken detailed analysis of asteroids and the findings could change the way the scientific community think about origins of water on our planet. Experts at the University of Arizona's Lunar and Planetary Laboratory (LPL) have discovered salt crystals on samples recovered from space. As their findings state, these crystals could only have formed with the presence of water. Sign up to our free Indy100 weekly newsletter The research was undertaken on samples of the asteroid Itokawa in 2005 by the Japanese Hayabusa mission. It suggests that S-type asteroids could be home to more water than previously thought. The new findings led some scientists to claim that water is likely to have arrived on asteroids when our planet was first being formed. The senior’s author Tom Zega said: "The grains look exactly like what you would see if you took table salt at home and placed it under an electron microscope. "They're these nice, square crystals. It was funny, too, because we had many spirited group meeting conversations about them, because it was just so unreal. Zega added: "It has long been thought that ordinary chondrites are an unlikely source of water on Earth. Our discovery of sodium chloride tells us this asteroid population could harbour much more water than we thought." Itokawa is a S-type asteroid, and it’s thought that temperatures on their surfaces were too high for water to form. Shaofan Che, who is the lead study author, said: "In other words, the water here on Earth had to be delivered from the outer reaches of the solar nebula, where temperatures were much colder and allowed water to exist, most likely in the form of ice. "The most likely scenario is that comets or another type of asteroid known as C-type asteroids, which resided farther out in the solar nebula, migrated inward and delivered their watery cargo by impacting the young Earth." Have your say in our news democracy. Click the upvote icon at the top of the page to help raise this article through the indy100 rankings.