Physics
Starfish made of feather-light foam wins photo prize
With its spindly neon tendrils, a false-coloured image of graphene foam, stripped of its skeleton, has won first prize in an annual engineering photo competition
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Space
Philae’s hop, skip and jump across comet 67P
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Health
Enter the kaleidoscopic world of cancer drug crystals
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Polar bear dives into Arctic sea near explorers’ grave
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Today on 91av
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Earth
Rainbow palette found in Brooklyn’s contaminated water
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Feedback: When the web was in the egg
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