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  1. Life

    Brittle arms lose muscle

    In lab simulations of future ocean conditions, brittle stars grow extra-calcified but puny arms.

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  2. Health & Medicine

    Stub it out

    Quitting cigarettes shows health benefits even decades after the last puff.

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  3. Humans

    Teeth chronicle infant diet

    Chemical analyses of teeth, including fossilized ones, may provide clues that tell anthropologists the age at which a child was weaned.

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  4. Physics

    Gödel, Escher, Chopin

    Musical theorists see inuitive links between musical chords and geometries.

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  5. Life

    Not so different after all

    Plague bacteria may be deadlier than its harmless cousin because of a few small genetic changes.