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  1. Health & Medicine

    Sleeping pills may have unexpected effects on the snoozing brain

    As scientists unravel how sleep benefits the body, a study in mice is highlighting the potential pitfalls of using Ambien and other sleep aids.

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  2. Materials Science

    The best way to cook an egg — in 32 minutes

    It’s hard to cook both the white and the yolk of the egg to the right temperature. Scientists have found a new method, called periodic cooking.

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  3. Ecosystems

    Extinct moa ate purple trufflelike fungi, fossil bird droppings reveal

    DNA analysis reveals the big, flightless moa birds ate — and pooped out — 13 kinds of fungi, including ones crucial for New Zealand’s forest ecosystem.