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Updated 2026-06-28 14:46
Animal hackers: altered creatures star in London exhibition
Wellcome Collection shows transgenic goat and rat bred to prefer alcohol in exhibition exploring humans’ perceptions of animalsWhat links an African clawed frog once used as a human pregnancy test, a transgenic goat bred to produce super-strong silk and a rat whose preference for booze may have helped Finnish alcoholics?All three have gone on display at a new exhibition at London’s Wellcome Collection alongside art works which include roadkill taxidermy and a film that tells the true story of a man who kept a pet tiger in his New York apartment. Continue reading...
The case of the desperately ill spy and the untraceable poison
It sounds like the stuff of Bond films, but 10 years ago the tragic case of ‘Edwin Carter’ presented doctors and police with exactly this scenarioOn the afternoon of 3 November 2006 Edwin Carter arrived at Barnet Hospital, London, in an ambulance. He was vomiting, had bloody diarrhoea, and was in a lot of pain. He had been like this for two days. His own doctor said it looked like typhoid, but it wasn’t typhoid. Staff at the hospital diagnosed gastroenteritis and started a course of antibiotics.The man’s condition improved slightly, but there were puzzling discrepancies in his lab results. Someone suffering from a bacterial infection would be expected to have a high white blood cell count, as the body produces more of these cells to fight off the infection. In this case the white blood cell count was very low and decreasing. Perhaps this was a reaction to the antibiotics. Perhaps not.
Could crowdsourcing expertise be the future of government?
Recent political events have revealed tensions between expertise and democracy. Institutions must tap into the know-how of the many, not the fewWe lack public institutions - a participatory bureaucracy and open parliamentary processes - that know how to tap into the collective intelligence of our communities, and draw power from the participation of the many, rather than the few.It is the absence of these open institutions, and the resulting failure to take account of the views, voices and know-how of the many disaffected people who voted – and those who did not – during the EU referendum and the US presidential election, which create a vacuum that charismatic demagogues end up filling. Continue reading...
Newcomb's problem: which side won the Guardian's philosophy poll?
On Monday we asked readers to pick a side in one of philosophy’s most contentious conundrums. Here are the results.The votes are in. They have been counted. It was close. Very close.But before we get there, the question again: Continue reading...
If I have cancer will I die? You asked Google – here’s the answer | Ranjana Srivastava
Every day millions of internet users ask Google life’s most difficult questions, big and small. Our writers answer some of the commonest queriesOn a Sunday afternoon, a relative calls. She is at a party and wonders if I can help a friend of a friend.“Her brother is having cancer treatment and wanted to talk to you.” Continue reading...
How did the whale get its “moustache”? | Elsa Panciroli
Palaeontologists have uncovered clues to one of the great mysteries of whale evolution: the filter-feeding baleenWhen I was in primary school, one of my favourite books was Ted Hughes’ How the Whale Became. For children who persistently ask “why” about everything, Hughes provided tall tales to explain animal origins, using the bizarre logic that children’s fiction thrives upon. For example: the hare grew long ears to hear the answer to its marriage proposal to the moon. Well, naturally. These stories fuelled my imagination about animal origins, albeit in an absurdist Lamarckian fashion.We now know, thanks to Darwin, Russel Wallace, and the many great scientists since, that living things don’t evolve traits in order to accomplish a goal. Traits that improve survival are passed along to an animals’ offspring. The hare didn’t grow his ears to listen for whispers from a high place, but an ancestor with bigger ears thanks to a random mutation, would have heard danger approaching before the other proto-hares. And so it survived to produce bigger-lugged babies. Continue reading...
Black Death burial pit found at site of medieval abbey in Lincolnshire
Carbon dating shows skeletons are from mid-14th century, while DNA tests of teeth find presence of plague bacteriumA mass burial pit of victims of the Black Death dating back to the 14th century has been discovered near Immingham in Lincolnshire.Archaeologists from the University of Sheffield were searching the site of Thornton Abbey, once one of the country’s biggest medieval abbeys, for evidence of a post-medieval building when they came across the grave containing 48 skeletons, 27 of them children. Continue reading...
CBT 'should be routinely offered' to women with premenstrual syndrome
Gynaecologists advise that cognitive behavioural therapy could help women manage the symptoms of PMSWomen experiencing premenstrual syndrome should routinely be offered cognitive behavioural therapy to help them manage the symptoms, gynaecologists have said.Around 40% of women experience symptoms of PMS with around 5%-8% having severe symptoms. Physical symptoms can include swollen breasts and bloating, and the psychological symptoms are wide-ranging, including depression, irritability, suicidal thoughts and loss of confidence. The condition can be debilitating, disrupting school, social and work life. Continue reading...
Health racquet: tennis reduces risk of death at any age, study suggests
Research indicates regular badminton and tennis are sports most protective to health, while football and running are bottom of the tableIf you want to stave off death for as long as possible, you might want to reach for a tennis racquet.Scientists attempting to tease apart the benefits of different sports have found that regularly taking part in sports such as badminton or tennis reduces your risk of death at any given age by almost 50%, with swimming and aerobics also proving protective. Continue reading...
Cassini spacecraft to begin swansong orbit of Saturn
After just over 19 years ago, the Cassini orbiter will use the last of its fuel in a set of intrepid orbits before diving into Saturn and burning upAfter nearly two decades, more than 300,000 incredible images and the discovery of no fewer than seven moons, the Cassini spacecraft orbiting Saturn is set to begin its gutsy swansong.Launched just over 19 years ago, the Cassini orbiter – complete with its lander Huygens – spent seven years journeying to Saturn in order to explore the planet, its rings and its moons. Continue reading...
Never go to bed angry - study finds evidence for age-old advice
During sleep the brain reorganises the way negative memories are stored, making them harder to reverse, evidence indicatesNever go to bed angry, the old saying goes, or bad feeling will harden into resentment. Now scientists have found evidence to support the idea that negative emotional memories are harder to reverse after a night’s sleep.The study, published in the journal Nature Communications, suggests that during sleep, the brain reorganises the way negative memories are stored, making these associations harder to suppress in the future. Continue reading...
Forget ‘baby on board’ - how about a badge for the recently dumped? | Catherine Shoard
Why restrict badges to happily pregnant women when the world is only too full of people who urgently do need cheering up?Turns out there is very little point wearing a baby-on-board badge if you commute in rush hour. Squeezing through the doors is challenge enough, getting close enough to the seats to be spotted a pipe dream.Still, I’ve kept mine pinned on, partly in case I’m up early enough to travel off-peak, and partly as a discreet way to alert acquaintances I’m not just even greedier than usual. Continue reading...
Drink and be merry: why alcohol makes us feel good, then doesn’t | Dean Burnett
With the festive season upon us, many of us will get through a lot of booze. But why do we consume it when it has undeniably negative effects?If someone offered you a glass of mild poison, you’d decline. If they said “drink this, it’ll make it harder to walk, speak and remember things, and you’ll feel awful tomorrow”, you’d be even less keen. If they expected payment for it, you might even get annoyed at their audacity. You certainly wouldn’t be grateful for it, then buy yourself and them several more doses over the course of an evening. Nonetheless, this happens all the time.Alcohol does all the things described above and more. Nonetheless, many people don’t let that put them off. With the festive season kicking off, alcohol consumption goes up. The parties (work and otherwise), time-off, social visits, the breakfast champagne, and so on. All these “festive tipples” add up to an increase in our intake of something that, if the dose is high enough, counts as a toxin. Continue reading...
Stroke patients in UK 'missing out on treatment for brain clots'
Thousands of patients not being offered procedure that can dramatically reduce disability after a stroke, research suggestsThousands of stroke patients in the UK may be missing out on a treatment that involves physically unplugging blood vessels in the brain, research suggests.Scientists estimate that about 9,000 patients with blood clots in the brain – a tenth of the total – could benefit from mechanical thrombectomy (MT) each year. Currently, fewer than 600 patients a year undergo the procedure. Continue reading...
Big Unknowns: can we stop ageing? – Science Weekly podcast
With advances in medicine, science, and technology allowing humans to live longer than ever, can we finally crack the code of ageing and stop it altogether?Subscribe & Review on iTunes, Soundcloud, Audioboom, Mixcloud & AcastOn 4th August 1997, Jeanne Louise Calment died in a French nursing home. Born 122 years and 164 days earlier, Jeanne currently holds the record for the greatest fully authenticated age to which any human has ever lived. And with the ever-growing average life expectancy for humans showing no sign of slowing down, how close are we to cracking the code of longevity? Continue reading...
Was Einstein wrong? Physicists challenge speed of light theory – video explainer
The speed of light in a vacuum has been considered one of the fundamental constants of nature since Einstein’s theory of general relativity was published a century ago. But João Magueijo, of Imperial College London, and Niayesh Afshordi, of the University of Waterloo in Canada, propose that light tore along at infinite speed at the birth of the universe. Now the pair have described for the first time how scientists can test their controversial idea Continue reading...
Theory challenging Einstein's view on speed of light could soon be tested
New paper describes for first time how scientists can test controversial idea that speed of light is not a constantThe newborn universe may have glowed with light beams moving much faster than they do today, according to a theory that overturns Einstein’s century-old claim that the speed of light is a constant.
Spectacular bronze age gold torc unearthed in Cambridgeshire field
Gigantic item found by a metal detectorist is among recent finds in England and Wales reported to archaeological authoritiesA gigantic gold torc, so big one expert thinks it may have been worn to protect a pregnant woman, has been found by a metal detectorist in a ploughed field in Cambridgeshire. It was made from 730 grams of almost pure gold more than 3,000 years ago, and is regarded as the best found in England in more than a century.The workmanship closely resembles one from nearby Grunty Fen, found in 1844 by a man cutting peat, now in the collection of the archaeology museum of Cambridge University. However, like many torcs that were apparently buried for ritual reasons, that one had been coiled up. Continue reading...
‘Poor little snowflake’ – the defining insult of 2016
The term ‘snowflake’ has been thrown around with abandon in the wake of Brexit and the US election, usually to express generic disdain for young people. How can we neutralise its power – and is it a bad metaphor anyway?Between the immediate aftermath of Brexit and the US presidential election, one insult began to seem inescapable, mostly lobbed from the right to the left: “snowflake.” Independent MEP Janice Atkinson, who was expelled from Ukip over allegations of expenses fraud, wrote a piece for the Huffington Post decrying the “wet, teary and quite frankly ludicrous outpouring of grief emails” she had received post-referendum as “snowflake nonsense”. The far-right news site Breitbart, whose executive chairman Stephen Bannon is now Donald Trump’s chief strategist, threw it around with abandon, using it as a scattershot insult against journalists, celebrities and millennials who objected to Trump’s inflammatory rhetoric; its UK site used it last week to criticise a proposed “class liberation officer” at an Oxford college who would provide more support for working-class students.On an episode of his long-running podcast in August, Bret Easton Ellis discussed the criticism of a lascivious LA Weekly story about the pop star Sky Ferreira with a furious riposte to what he calls “little snowflake justice warriors”: “Oh, little snowflakes, when did you all become grandmothers and society matrons, clutching your pearls in horror at someone who has an opinion about something, a way of expressing themselves that’s not the mirror image of yours, you snivelling little weak-ass narcissists?” Continue reading...
Hemosep: the machine set to revolutionise blood transfusions
A new medical device that give a patient’s own blood back to them could, its makers say, save lives and money, and is already being used around the world. So why isn’t the NHS buying any of them?The idea of being able to recover a patient’s own blood and put it back into their body is not new. But until now it has been expensive and largely unworkable. Autotransfusion, as it is known, has typically used large, complex, centrifugal devices that require skilled operators, take a lot of time and are very expensive. The cumbersome machines used in many hospitals return just the red blood cells, eliminating the platelets needed for clotting and the white cells required to fight infection. That can lead to complications.But a new machine, devised by Strathclyde University’s biomedical engineering department, may change all that. Hemosep, as it is known, is designed for use during major surgery. It removes blood from the surgical site, takes out the plasma and returns the vital blood cells to the patient, all through a single lightweight device. Continue reading...
Newcomb's problem divides philosophers. Which side are you on?
Newcomb’s problem has split the world of philosophy into two opposing camps. Two philosophers explain - then take the test yourselfTwo boxes or not two boxes? That is the question.For almost half a century Newcomb’s problem has been one of the most contentious conundrums in philosophy, with ramifications in economics, politics and computer science. Continue reading...
Bobby: the gorilla on the wrong side of the law
The western lowland gorilla was smuggled from Africa to Italy in the 1980s. As taxidermy, he is part of a new exhibition at the National Museum of ScotlandName: Bobby
The December night sky
The highlights to watch out for in December, including the annual Geminids meteor shower, somewhat swamped this year by the proximity of another ‘supermoon’The unrivalled constellation of Orion is the stand-out feature of our long December nights which are bracketed by the two brightest planets – Venus as a brilliant evening star, and Jupiter in the pre-dawn. It is a shame that yet another supermoon coincides with the peak of the Geminids meteor shower to swamp what might have been the richest meteor display of the year. Continue reading...
HIV vaccine test hopes for breakthrough in combat against the virus
New vaccine trial in South Africa builds on previous RV144 study to bring in more effective prevention of infectionThe first new trial of a potential vaccine against HIV in seven years has begun in South Africa, raising hopes that it will help bring about the end of the epidemic.Although fewer people are now dying from Aids because 18.2 million are on drug treatment for life to suppress the virus, efforts to prevent people from becoming infected have not been very successful. The infection rate has continued to rise and experts do not believe the epidemic will be ended without a vaccine. Continue reading...
Why it pays to be late (sometimes)
The world is changing so fast and we’re always in a rush. We need to learn to pause
Genetically modified mosquitoes could be released in Florida Keys by spring
In fight against Zika, British company Oxitec must seek approval from FDA for insects’ release into the wild following Monroe County referendumGenetically modified mosquitoes could be released in the Florida Keys as early as this spring, an official said, after voters in Monroe County, Florida, approved the experiment in a referendum on election day.The British company Oxitec will still need to apply to the US Food and Drug Administration for approval, as the original location for the trial – Key Haven – voted against the trial. The experiment could be the first time a genetically modified animal is released into the wild in the United States. Continue reading...
Move over Freud: literary fiction is the best therapy
Fiction breaks down social isolation and creates a sense of belonging, argues the author and former psychoanalystOne of my maxims as a university teacher of literature was: “A great novel not only enhances our understanding – more crucially it understands us.” When I later trained as a psychoanalyst I annoyed my tutors with my refrain that one could learn more about the subtleties of human psychology from literature than from the works of Freud, Adler or Jung. This was not to decry the pioneering wisdoms of those great psychologists, but years of teaching literature convinced me that fiction trumps theory in its illumination of the hidden recesses of our consciousness.Related: Therapy wars: the revenge of Freud | Oliver Burkeman Continue reading...
'Artificial gravity' device could be key to astronaut health on Mars mission
Researchers have created a vacuum cleaner-like exercise device to prevent problems associated with weightlessness on long-distance space missionsIn the film 2001: A Space Odyssey, Stanley Kubrick’s spacecraft spins through the solar system like a giant, futuristic ferris wheel. The rotating craft has a suitably epic quality and, through the centrifugal force, conveniently explains why there appears to be gravity inside the spaceship.In real life future astronauts may have to settle for a slightly less cinematic form of artificial gravity, however. Space scientists working on the problem have developed a large vacuum cleaner-like device that seals around the astronaut’s waist, creating the impression of weight on the lower body through a powerful suction force. Continue reading...
The week in wildlife - in pictures
A newborn Sitatunga calf and an orange-bellied parrot are among this week’s pick of images from the natural world Continue reading...
Why melting Arctic ice can cause uncontrollable climate change – video report
Arctic scientists have reported that the speed at which the northern ice cap is melting risks triggering 19 climate tipping points, with disastrous consequences. It could also affect ecosystems elsewhere on Earth, perhaps irreversibly. The Arctic Resilience Report says it is crucial to reduce greenhouse gas emissions
Lab notes: What's jolly, wears red and could be a source of psychological trauma?
I know, it’s still November, but psychologists have managed to get in early with some seasonal gloom (well, the news on melting Arctic ice isn’t great, but since it’s been decided that’s “politicised science”, it’s not important, right?). Apparently, belief in Santa Claus spells potential trouble for parent-child relationships. Me, I’m more concerned that the Man in Red’s well-documented long-term obesity has had an impact on his microbiome, which according to researchers could contribute to a cycle of yo-yo weight loss. Still, it’s possible that as an unageing supernatural being Santa is ahead of the scientific curve - this week researchers have announced that they are going to launch a human trial of a process that “resets” abnormal levels of proteins seen in older blood. It’s hoped that this will slow down the ageing process and prevent age-related diseases. This would be welcome progress, given the disappointment this week as potential Alzheimer’s drug solanezumab failed to deliver in the final stage of clinical trials. I’m not going to leave you on a sad note - let’s go bittersweet first: ESA scientists have trawled through the Schiaparelli data and think they know what went wrong with the Mars lander. And to make you actually smile and go “wow!”, here’s an amazing new resource that shows the first eight weeks of human embryonic development, plus a cool canine memory study. And if you’re scared of dogs, here’s some good news on the phobia front too. All better now? Continue reading...
How do women really know if they are having an orgasm?
Dr Nicole Prause is challenging bias against sexual research to unravel apparent discrepancies between physical signs and what women said they experiencedIn the nascent field of orgasm research, much of the data relies on subjects self-reporting, and in men, there’s some pretty clear physiological feedback in the form of ejaculation.But how do women know for sure if they are climaxing? What if the sensation they have associated with climax is actually one of the the early foothills of arousal? And how does a woman know if she has had an orgasm?
Thomas Edison talks about electricity - archive, 25 November 1896
25 November 1896: The American inventor discusses future developments such as electric-powered motor vehicles and renewable sources of energyThe “Telegraph” publishes an account of an interview which its New York correspondent had on Monday with Mr. Edison regarding the probable future developments of electricity for locomotive, domestic, and commercial purposes. The following is an extract: –
Arctic ice melt could trigger uncontrollable climate change at global level
Scientists warn increasingly rapid melting could trigger polar ‘tipping points’ with catastrophic consequences felt as far away as the Indian OceanArctic scientists have warned that the increasingly rapid melting of the ice cap risks triggering 19 “tipping points” in the region that could have catastrophic consequences around the globe.The Arctic Resilience Report found that the effects of Arctic warming could be felt as far away as the Indian Ocean, in a stark warning that changes in the region could cause uncontrollable climate change at a global level. Continue reading...
Spaceship fires were all in a good cause
Scientists who started several blazes on a cargo ship were trying to find out what happens when different materials burn in the confines of a spacecraftA fire broke out onboard a cargo ship leaving the International Space Station (ISS) this week, but it was no emergency. It was part of the Spacecraft Fire Experiment 2 (Saffire-II) experiment to investigate combustion in microgravity to improve safety on future spaceflights.Nine samples were burnt in controlled conditions inside the spacecraft during the early hours of Tuesday UK time. They included silicon of various thicknesses, which is one of the most widely used flammable materials in spacecraft; a cotton-fibreglass fire retardant called Nomex; and the same acrylic glass that is used for spacecraft windows. Continue reading...
3D embryo atlas reveals human development in unprecedented detail
Digital model will aid vital research, offering chance chance to explore intricate changes occurring in the first weeks of lifeThe beautiful and otherworldly development of the human embryo has been revealed in unprecedented detail in an interactive three-dimensional atlas.The digital models, built by a team of scientists in the Netherlands, took around 45,000 hours to produce and offer researchers an unparalleled glimpse into the first eight weeks of human development. Continue reading...
Thunderstorm asthma: how seasonal weather can affect human health
At least four dead and others hospitalised due to weather event scientists broadly agree forces harmful allergens into airMelbourne has suffered what appears to be the most lethal episode of thunderstorm asthma on record. With at least four deaths and more patients left in intensive care, the storm has served as a grim reminder that the seasonal weather occurrence can have tragic knock-on effects for human health. “This is an extraordinary event,” said Prof Anthony Seaton, who has worked on thunderstorm asthma at the University of Aberdeen. “I don’t know of any event as severe as this.”Related: Three still in critical condition after Melbourne 'thunderstorm asthma' Continue reading...
Yo-yo weight gain driven by gut bacteria's 'memory' of obesity, says study
Regaining weight after a diet could be linked to changes in microbiome caused by obesity, not simply a return to bad eating habitsPeople who struggle to maintain a healthy weight after dieting may do so because their gut bacteria retains a “memory” of their past weight, according to scientists.The study, in mice, suggests that yo-yo dieting is not simply a reflection of people returning to unhealthy eating habits, but could be driven by long-term changes in gut bacteria brought about by obesity. Continue reading...
Snakes versus dragons: how we filmed this sequence for Planet Earth II
Cameraman Richard Wollocombe reveals what it took to capture the stand-out sequence of Galapagos racer snakes hunting baby marine iguanas en masseWe filmed this sequence over a period of two years, in two trips to Galapagos of about 18 filming days each, adding up to around 400 hours of field time. The edited material from Galapagos lasts less than nine minutes. It contains the first ever footage of snakes hunting dragon-like marine iguanas en masse, one of the most thrilling examples of animal behaviour I have had the privilege to film.
What will an extra £4.7 billion do for UK science and innovation?
An unexpected autumn statement windfall for research, innovation and industrial strategy has given scientists their first bit of cheer for a while
Schiaparelli crash-landed on Mars after misjudging altitude – video report
The Schiaparelli lander that crashed on Mars last month flew into the red planet at 335mph after a computer misjudged its altitude, the European Space Agency said on Wednesday. Though the landing was unsuccessful, engineers will be able to use it as experience for future Mars missions
Piecing back together an Iraqi archaeological gem blown sky-high by Isis
The ancient Assyrian city of Kalhu fascinated tourists until extremists set about erasing it because it pre-dates IslamThe shattered ruins of Nimrud say different things to different people. To Sheikh Abdullah Saleh, a custodian of the ancient site until he was chased away by Islamic State extremists two years ago, they represent nothing but destruction and loss.To Iraqi archaeologist Layla Salih the hulking piles of rock are a big jigsaw puzzle, from which one of the world’s most significant ancient sites might be slowly rebuilt. Continue reading...
Beautiful equations: the enigma of prime numbers – video
For Professor Marcus du Sautoy, the ‘enigma of prime numbers’ is at the heart of the greatest unsolved problem in mathematics. Riemann’s formula calculates how many primes there are – an infinite number that is crucial to the security of online banking
Mars lander smashed into ground at 540km/h after misjudging its altitude
Schiaparelli thought it had landed on Mars when in fact it was still 3.7km above the surface, says European Space AgencyA tiny lander that crashed on Mars last month flew into the red planet at 540km/h (335mph) instead of gently gliding to a stop, after a computer misjudged its altitude, the European Space Agency has said.Schiaparelli was on a test-run for a future rover meant to seek out evidence of life, past or present, but it fell silent seconds before its scheduled touchdown on 19 October. Continue reading...
Belief in Santa could affect parent-child relationships, warns study
CAUTION: this article contains sensitive information concerning the existence of Santa ClausSpoiler alert: this article contains sensitive information about the existence of Santa Claus. Children may wish to look away now.Parents, though, are being urged to re-consider the ethics of the great Santa Claus lie. In an article published in the journal Lancet Psychiatry, two psychologists have raised the spectre of children’s moral compass being permanently thrown off-kilter by what is normally considered a magical part of the Christmas tradition. Continue reading...
Seaweed: marine life coming ashore
Industry has long harvested some of the 700 seaweed species in British waters, but are large-scale algae farms on the horizon?British seaweeds are among our most underrated resources and hugely important for the ecology of the seas, but they get nothing like the recognition that, say, a wild meadow or ancient woodland gets.Related: Seaweed biofuels: a green alternative that might just save the planet Continue reading...
I was 52, a non-smoker, and told I had lung cancer. Life as I knew it was over | Briony Scott
The fastest growing subset of people dying from lung cancer is young women who have never smoked. We need less stigma around the disease, and more hopeThere is no such thing as a “good” cancer. If you’re being told you have cancer, by any criteria, you’re not having a good day.On 26 August, 2015 – Daffodil Day – I was diagnosed with lung cancer. I was 52, a mother of three, and have never smoked. Apart from a cough I’d had for a couple of weeks, I was feeling great. I turned up to the GP ready to be lectured on the overuse of antibiotics. Instead I was sent for an X-ray. Continue reading...
Obesity alters brain structure and function
It’s not just your waistline that suffers as you put on weight. Researchers are beginning to find puzzling new links between obesity, memory loss and dementiaLucy Cheke and her colleagues at the University of Cambridge recently invited a few participants into her lab for a kind of ‘treasure hunt’.The participants navigated a virtual environment on a computer screen, dropping off various objects along their way. They then answered a series of questions to test their memory of the task, such as where they had hidden a particular object. Continue reading...
Fireball streaks across Florida sky – video
A Florida police officer and local residents captured on video an unidentified fireball streaking across the sky on 21 November. The footage shows the moment when the fireball approaches Earth and finally explodes in a flash. The American Meteor Society (AMS) has received over 150 reports about the fireball that was mainly seen from Florida, but was also witnessed in Georgia and Alabama. According to AMS, a fireball is an extremely bright meteor Continue reading...
Unlocking the genetic code of an ancient survivor | Susannah Lydon
The draft genome of Ginkgo biloba, the sole surviving species of an ancient group of seed plants, has been publishedGinkgo biloba is a beautiful tree. Its elegant fan-shaped leaves, which turn a vivid yellow in Autumn, are often borrowed by the world of art and design. In South-East Asia, ginkgo has a long association with Buddhist temples and the trees themselves are regarded with reverence. While small wild populations have been identified in mountain groves in South West China, ginkgo has a global distribution, due to its popularity as a cultivated tree. Its tolerance of pollution makes it particularly popular with city planners. Male trees are preferable for this purpose, however (ginkgo is dioecious, with separate male and female trees), because the edible fleshy seeds are notoriously smelly. Ginkgo is also used in traditional medicine, and Ginkgo biloba extract is a widely available dietary supplement.Ginkgo biloba is the archetypal “living fossil” of the plant world, even if this label sometimes causes more confusion than it solves. Fossils tell us that the gross morphology of its leaves has remained stable for more than 200 million years, although a variety of associated reproductive structures have been recognised. The fossil record also tells us that ginkgoes were widespread, and found in fossil assemblages not too different ecologically from the forests they still live in today. What ancient fossils cannot tell us is very much about how ginkgoes are related to the other major plant groups. Continue reading...
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