Feature

  1. A Man’s Job

    Sperm contain an unexpected payload of RNA, a discovery offering insight into infertility, cloning, and contraception.

    By John Travis

  2. Get Rid of the Bodies

    Scientists are learning how organisms safely clear out cell corpses.

    By John Travis
  3. Materials Science

    Materials with Memory

    Metal alloys and polymers that can remember a preprogrammed shape may literally reshape technologies ranging from warfare to medicine and car repair.

    By Jessica Gorman

  4. Evolutionary Upstarts

    Theories of the evolution of the human mind are evolving, with some researchers now presenting alternatives to the dominant notion that genetic competition for survival during the Stone Age yielded brains stocked with a bevy of instincts for specific types of thinking.