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  1. Earth

    Greaseball Challenge

    And they’re off! The participants in this charity biofuel car rally are on their way from the U.S. East Coast to San Jose, Costa Rica. Powered by biodiesel, vegetable oil, waste grease, and other alternative fuels, the vehicles will all be donated to local communities at the end of the rally, which runs until April […]

    By Science News
  2. Anthropology

    Disinherited Ancestor: Lucy’s kind may occupy evolutionary side branch

    A controversial analysis of a recently discovered jaw from a 3-million-year-old Australopithecus afarensis puts Lucy's species on an evolutionary side branch that eventually died out.

    By Bruce Bower
  3. Health & Medicine

    Agents of Metastasis: Four proteins conspire in breast cancer spread

    Four proteins work together to assist cancer growth and metastasis, and drugs against them inhibit both processes, tests in mice suggest.