science
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Robot monitors in homes of elderly people can predict falls, says studyIn future, sensor networks could interpret movement data and contact relatives or support staff when a person is at risk
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Woolly mammoth on verge of resurrection, scientists revealScientist leading ‘de-extinction’ effort says Harvard team just two years away from creating hybrid mammoth-elephant embryo -
Zealandia – pieces finally falling together for continent we didn't know we hadThe landmass – about two-thirds the size of Australia – of which 94% is under water, is a step closer to being recognised, scientists say -
'We are rewriting the textbooks': first dives to Amazon coral reef stun scientistsScientists have discovered the river reef is far bigger, and more important, than first thought – a biodiversity hotspot on a par with the Great Barrier Reef. Now they face a race to protect it from big oil
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Antibiotics, not surgery, could treat appendicitis in children, study suggestsAppendix removal is the most common emergency surgery in children, but researchers say that antibiotics might offer a less-invasive alternative
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Welcome home, Lonesome George: giant tortoise returns to GalapagosAfter almost five years with taxidermists in New York, Lonesome George has returned home. He may be dead, but his legacy is very much alive
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Scientists to repeat 19th-century ship's crossing of polar ice capAmbitious Mosaic expedition will study weather patterns and life in melt ponds from vessel drifting with the ice current
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'Science for the people': researchers challenge Trump outside US conferenceScientists rally in Boston amid alarm over president’s views and fears for the future of the EPA, as ecologist likens current struggle to Galileo’s
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key issues
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SpaceSpaceSpaceX rocket blasts off from historic NASA launchpad – videoSpaceX successfully launches a Falcon 9 rocket in Florida on Sunday on a resupply mission to the International Space Station
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BiologyBiologyLife forms that could be 50,000 years old found in caves in MexicoThe bizarre, ancient microbes and viruses found living in crystals in extremely punishing conditions deep in an abandoned lead and zinc mine
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GeneticsGeneticsBill Gates warns tens of millions could be killed by bio-terrorismMicrosoft founder and philanthropist tells Munich security conference genetic engineering could be terrorist weapon
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Medical researchMedical research3D-printed prosthetic limbs: the next revolution in medicineDoctors are hoping that 3D printing could help the 30 million people worldwide in need of prosthetic limbs and braces
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PsychologyPsychologyTrump’s fragile male ego craves the dangerous drug of adulationThe president’s hyped-up behaviour at his Florida rally was an alarming display of his neediness. Maybe he should have his own theme park
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PhysicsPhysicsTime Travel: A History by James Gleick review – from mechanical to mentalThis roving study of our fascination with time travel covers well trodden ground but finds the concept constantly evolving
in depth
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Alex Barakan obituaryOther lives: aeronautical engineer who turned his interest in psychoanalysis into a second career
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opinion
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Trump’s fragile male ego craves the dangerous drug of adulationThe president’s hyped-up behaviour at his Florida rally was an alarming display of his neediness. Maybe he should have his own theme park
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Churchill’s scientific papers reveal an even greater politician than we thoughtFrom alien life to foreseeing the nuclear age, Churchill’s essays reveal a dazzling scope of inquiry that would be unimaginable on the part of western leaders today
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pictures & video
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NASA's ISS crew throw American football in space to honour Super Bowl – videoAstronauts throw an American football around the International Space Station on Saturday to mark the upcoming Super Bowl LI on Sunday
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Spacewalks and moon landings: Nasa archive photos up for auctionA set of pictures from US space programme, including the first moon landing images, could fetch up to £20,000 at a New York auction next month
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Tim Peake set for return mission to International Space Station – videoTim Peake, the British astronaut will return for a second mission to the International Space Station alongside his fellow classmates from 2009
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SpaceX successfully launches and lands first rocket since explosion – videoSpaceX successfully launches and lands it’s first rocket since a previous attempt exploded before takeoff last year
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What is thundersnow? – video explainerThundersnow is a rare weather phenomenon which looks set to make an appearance in the UK over the next couple of days
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Press paws: point-of-view camera reveals polar bears in action – videoScientists from the US Geological Survey (USGS) attached a camera to a female polar to study her behaviour and feeding rates
GM 'surrogate hens' could lay eggs of rare chicken breeds, scientists say