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  1. Health & Medicine

    Enzyme might underlie some stroke damage

    Inhibiting NOX4 in mice limits brain injury, tests show.

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  2. Planetary Science

    Life’s cold start

    Primordial molecules could have replicated themselves in a slushy place, new experiments suggest.

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  3. Tech

    A compass that lights the way

    Researchers develop a highly sensitive optical instrument for measuring magnetic fields.

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  4. Health & Medicine

    Obesity in children linked to common cold virus

    Exposure to adenovirus-36 may partly explain why kids are getting heavier, a new study suggests.

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  5. Tech

    To tame traffic, go with the flow

    Lights should respond to cars, a study concludes, not the other way around.