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  1. Animals

    Bird fads weaken sexual selection

    There's a new look for a hot male among lark buntings every year.

    By Susan Milius

  2. More evidence that flies sleep like people

    A brain chemical puts fruit flies to sleep.

    By Tina Hesman Saey

  3. 19926

    This article was wonderful. We have had light and electron microscopes. Can we look forward to atom-wave microscopes? Bill SchindeleThousand Oaks, Calif. Yes. A team led by Bodil Holst at Graz University of Technology in Austria has built a microscope that bombards a sample with helium waves and then measures how the waves reflect to […]

    By Science News
  4. Physics

    Extreme Measures

    Physicists use atom interferometry to measure gravity and other forces with unrivaled precision, and the technique could potentially guide airplanes and uncover buried caches of oil and diamonds.