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  1. Physics

    Being single a real drag for spores

    Launching thousands of gametes at once helps a fungus waft its offspring farther.

    By Rachel Ehrenberg
  2. Tech

    Tiny tools aren’t toys

    Enzyme-based machinery could have medical applications.

    By Rachel Ehrenberg
  3. Climate

    Annual Arctic ice minimum reached

    Melt isn’t as bad as 2007, but still reaches number three in the record books.

    By Alexandra Witze
  4. Humans

    Neandertals blasted out of existence, archaeologists propose

    An eruption may have wiped out Neandertals in Europe and western Asia, clearing the region for Stone Age Homo sapiens.

    By Bruce Bower
  5. Life

    Imperfect mimics

    Reprogramming techniques may not produce exact embryonic stem cell replicas.