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  1. Life

    Early RNA may have used isolation strategy to defeat useless mutants

    Temporary barriers help RNA escape shorter, faster-replicating parasites

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  2. Health & Medicine

    Oldest traces of smallpox virus found in child mummy

    The oldest genetic evidence of smallpox comes from variola virus DNA found in a child mummy buried in a church crypt in Lithuania.

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  3. Animals

    Why crested penguins lay mismatched eggs

    After long migratory swims, crested penguins lay one small and one larger egg.

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  4. Earth

    Third kind of quasicrystal found in Russian meteorite

    A new quasicrystal found inside a Russian meteorite is the first ever found in nature before being synthesized in the lab.