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  1. Life

    To get a deeper tan, don’t sunbathe every day

    Skin cells make protective melanin on a 48-hour cycle.

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  2. Plants

    Liverwort plants contain a painkiller similar to the one in marijuana

    Cannabinoids found in liverwort plants could spell relief for those suffering from chronic pain.

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  3. Archaeology

    Ancient Clovis people may have taken tool cues from earlier Americans

    Ancient Americans’ spearpoints may have heralded later Clovis weapons.

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  4. Tech

    A new palm-sized drone is mini, but mighty

    Unlike other small drones, this flying robot can tote objects up to 40 times its own weight.