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  1. Tech

    On the Rebound

    When electronically reversed in time, acoustic echoes can zero in on a spot in space, focusing sound energy so that it may zap tumors, detect submarines, or transmit private and secure information.

    By Peter Weiss
  2. Humans

    From the March 11, 1933, issue

    GREAT LION OF LA BREA Bigger by a fourth than the proudest lion that walks the veldt today were the tallest of the great lions of California a hundred thousand years ago. Rivaled in size only by the short-faced bears whose bones have been found with theirs in the La Brea tar-pits, they could confidently […]

    By Science News
  3. Earth

    Autosub Under Ice

    Follow the Southampton (UK) Oceanography Centre’s “Autosub Under Ice” expedition to Antarctica’s Pine Island Bay.