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  1. Planetary Science

    Tryst in space: Craft, asteroid rendezvous

    On Valentine's Day, the NEAR spacecraft cozied up to the asteroid 433 Eros, becoming the first craft to orbit a tiny body.

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  2. Fly naps inspire dreams of sleep genetics

    Researchers have discovered a sleep-like state in the fruit fly.

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  3. Physics

    Melting nuclei re-create Big Bang broth

    The seething primordial matter that existed in the first microseconds after the Big Bang may have briefly reappeared in fireballs created at a European particle accelerator.

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  4. Migration may reawaken Lyme disease

    Lyme disease can hide in healthy-looking birds until the stress of migration drives it into a potentially infectious state.