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All the latest on newscientist.com: most precise clock ever, tech trainer perfects basketball shots, AI system to cut energy bills and more

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Earth

Carved ostrich egg is oldest depiction of the New World

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Earth

Fish need no refrigeration in Earth’s coldest city

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Enigma Number 1763

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Feedback: Ghost in the latrine

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Metallergy

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Water stones

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Double your luck

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Sharpen up

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Stick it to ’em

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Physics

Capturing alien auroras in a bottle

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