science
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Portable brain-scanning helmet could be future for rapid brain injury assessmentsStroke victims and those felled by head injuries on the sports pitch or battlefield could benefit from a new wearable scanner currently being tested
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Mystery of how the turtle's neck evolved may be solved by 150m-year-old fossilExamination of a fossilised turtle suggests the way modern animals withdraw both head and neck into their shells might be linked to snapping up prey -
Pooping in space: suit could help Nasa astronauts boldly go when duty callsThe Space Poop Challenge sought designs for a system that could collect human waste for up to six days, routing it away from the body without the use of hands -
'Draconian' Trump gag on scientists could affect legislation, experts warn‘Oppressive’ approach to federal agency communications could result in misinformation on climate change, former presidential science advisers said
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Sign up for Lab notes - the Guardian's weekly science updateGet a weekly round-up of the biggest stories in science, insider knowledge from our network of bloggers, and some distractingly good fun and games
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Dinosaur embryos reveal remarkable secrets of life – and extinctionA new study shows many dinosaurs may have taken many months to hatch from their eggs, leaving them vulnerable to sudden environmental changes
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Vitamin D 'proved to cut risk of colds and flu'Move would also save NHS money, argue authors of major study that shows vitamin D can reduce risk of respiratory infections
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William Happer: who is Trump's likely science adviser? – video reportThe eminent Princeton University professor, who is tipped to become Donald Trump’s science adviser, raises concerns over his stance on climate change
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key issues
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SpaceSpacePooping in space: suit could help Nasa astronauts boldly go when duty callsThe Space Poop Challenge sought designs for a system that could collect human waste for up to six days, routing it away from the body without the use of hands
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BiologyBiologyWoolly mammoth on verge of resurrection, scientists revealScientist leading ‘de-extinction’ effort says Harvard team just two years away from creating hybrid mammoth-elephant embryo
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Medical researchMedical researchPortable brain-scanning helmet could be future for rapid brain injury assessmentsStroke victims and those felled by head injuries on the sports pitch or battlefield could benefit from a new wearable scanner currently being tested
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PsychologyPsychologyWhat does Donald Trump’s handshake say about him?The US president’s aggressive ‘yank-shakes’ are like his political pronouncements – unpredictable and self-serving
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PhysicsPhysicsIs emergent quantum mechanics grounded in classical physics? - Science Weekly podcastDoes strange quantum behaviour emerge from run-of-the-mill classical physics? If so, what does this tell us about the fundamental nature of reality?
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Why do we see so many different things in Rorschach ink blots?Devised as a method of psychiatric assessment over a century ago, the reason people see so many shapes and figures in the blots may finally be explained
in depth
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Frozen lakes end the winter with an 'ice tsunami'Weatherwatch If the winds are strong enough and sustained, the spring can deliver ice shove or ice heave at the edge of lakes in the north of the globe
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opinion
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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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Climate change doubled the likelihood of the NSW heatwave – let’s be clear, this is not naturalRapid warming trend sees heat records in Australia outnumber cold records by 12 to one over the past decade
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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
Woolly mammoth on verge of resurrection, scientists reveal