News

  1. Life

    Time to chill

    Well-preserved fossils deposited in an Antarctic lake about 14 million years ago pin down when a large part of the now-icy continent most recently dipped below freezing.

    By Sid Perkins
  2. Health & Medicine

    Nanomagnets tackle cancer

    Under the influence of an external magnetic field, tiny magnets act as highly localized space heaters, warming to temperatures that kill adjacent cancer cells.

    By Janet Raloff
  3. Life

    Smallest known snake

    New species is thin as a spaghetti noodle but shorter.

    By Susan Milius
  4. Physics

    Chem 101

    At high pressures, inner electrons begin to affect the structure of lithium.

    By Davide Castelvecchi
  5. Space

    Officially ice

    Phoenix Mars Lander detects water, a landmark that, along with other successes, prompts NASA to extend the mission.