News

  1. Earth

    Radiation Redux: Forest fires remobilize fallout from bomb tests

    A sensor installed to monitor fallout from modern nuclear tests has detected small amounts of radioactive cesium produced by bomb tests decades ago and sent skyward by forest fires.

    By Sid Perkins
  2. Health & Medicine

    Keep on Going: Busy seniors live longer, more proof that it pays to stay active

    Healthy elderly people who burn a lot of calories each day may be gaining extra years of life.

    By Nathan Seppa
  3. Anthropology

    Little Ancestor, Big Debate: Tiny islanders’ identity sparks dispute

    New measurements bolster the 2-year-old claim that fossils of a half-size human ancestor found on an Indonesian island represent a new species.