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Earth

Cactus gum could make clean water cheap for millions

The prickly pear cactus, which grows all over the world, contains gum that can clear sediment and some bacteria from water

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Sense of smell makes flies’ time fly

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‘Fatness’ gene may thin your brain

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Maxed out: How long could you survive without food or drink?

Technology

Cask beer gets high-speed upgrade

Life

Japanese gut bacteria gain special powers from sushi

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Junk-fed rats have ‘drug addict’ brains

Earth

Rankings cut guesswork in sustainable fish farming

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For a trimmer figure, add an extra helping of gut bugs

Earth

Recipe for rarity: fish threatened by cookbooks

A study of seafood recipes over 122 years has shown that the prestige of big, predatory fish has grown even as overfishing has slashed their numbers

Earth

Bugs beware: we’re gunning for your genes

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Obesity: Food kills, flab protects

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Ale is good, make no bones about it

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Complex smells make food more filling