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  1. Fly naps inspire dreams of sleep genetics

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

    By Tina Hesman Saey
  2. 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.

    By Peter Weiss

  3. 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.

    By Susan Milius

  4. Two Meningitis Bacteria Yield Genomes

    Scientists have sequenced all the genes of two strains of a bacterium that causes meningitis, which may lead to the development of a much-needed vaccine

    By John Travis
  5. Humans

    From the February 15, 1930, issue

    ACRES OF PENGUINS IN ANTARCTICA Penguins by the acre are among the profusion of water animals inhabiting the regions adjacent to the desolate lands of Antarctica that help make its exploration of value, Dr.