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  1. Paleontology

    Mammoths may have gone extinct much earlier than DNA suggests

    Ancient DNA in sediments may be leading paleontologists astray in attempts to figure out when woolly mammoths and woolly rhinos died out, a new study argues.

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  2. Physics

    Physicists explain how to execute a nearly splashless dive

    A pocket of air lets elite divers pull off the rip entry, breaking through the water without sending it flying.

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  3. Health & Medicine

    50 years ago, a ‘cure’ for intoxication showed promise

    In 1972, vitamin and chemical injections reduced the amount of time that rats fed alcohol spent drunk. The science has yet to pan out for people.