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Earth’s extreme life holds hints to Martian past The discovery of life forms in the most inhospitable natural lake on Earth suggests the hunt for life on Mars needs a rethink Grey wolf’s future hinges on taxonomic row The existence, or not, of the eastern wolf as a distinct species has become a battleground in the fight to reintroduce the grey wolf to larger areas of the US Cells inside a body reprogrammed to become stem cells Adult cells have been induced to become stem cells inside live mice for the first time, raising hopes that organs could be prompted to repair themselves 3D-printed pump keeps damaged hearts beating in time A new electronic pump could let people with heart failure live a normal life and prevent them being bedridden, waiting for transplants Coping with the lasting costs of the Syrian war How do you house, feed and care for the millions of traumatised people who make up the biggest human migration in recent history? Predators learn to see through incredible camouflage It’s hard to spot the nightjar in this image, but over time this form of camouflage may be less effective than others New UK banknotes could provide cosy home for bugs Plastic banknotes, used in some countries and now under consideration in the UK, may be better at spreading bacteria than traditional cotton-fibre notes Strength of gravity shifts – and this time it’s serious The latest change in G, the gravitational constant, can’t be ignored – and might just be a sign that one explanation for mysterious dark energy is right More on these topics:
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