More from James Randerson
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It’s vast, for a virus
News
US in danger of breaking chemical weapons treaty
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End of the trail for Polynesia’s star snails
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Parkinson’s disease drug shows promise
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Some of us are born to binge
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Massive virus discovered in water tower
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Humans
Early chefs left indelible mark on human evolution
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Iraq war threatens sites of first civilisations
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Smarter poll could call the closest races
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Brainy crows learn how to upgrade tools
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Dialysis filters out killers
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Fair punishment supports human altruism
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