News

  1. Ecosystems

    Beetle attack overturns forest carbon regime

    Ravaged Canadian region switches from carbon sink to net carbon source.

    By Susan Milius
  2. Space

    Black hole once glowed brightly

    More than 26,000 years ago, the Milky Way's central black hole suddenly but fleetingly increases its X-ray output.

    By Ron Cowen
  3. Agriculture

    Study decodes papaya genome

    Scientists have added another plant to the genome-sequencing roster: the tropical fruit tree papaya.

    By Rachel Ehrenberg
  4. Earth

    Melt pond falls through ice in Greenland

    A lake of meltwater atop Greenland's ice sheet wedged open a crack in the underlying ice that drained the lake dry.

    By Sid Perkins
  5. Health & Medicine

    Old drug offers new tricks for fighting cancer

    A drug once envisioned as a treatment for cancer might instead prevent the occurrence of colorectal cancer.