News

  1. Earth

    Snow alga may be sizable carbon sink

    A common microorganism that adds a reddish tinge to some patches of snow may be a significant consumer of planet-warming carbon dioxide.

    By Sid Perkins
  2. Health & Medicine

    Blood-Clot Surprise: Finding might explain a danger of Viagra

    An amendment to the blood-clotting pathway might link Viagra to heart attacks in some users.

    By Kendall Morgan
  3. Astronomy

    Distant and Strange: Orb isn’t just another extrasolar planet

    A novel search technique that could ultimately find Earthlike worlds has uncovered an extrasolar planet that is 30 times farther away than any other planet detected and lies closer to its parent star than does any other orb discovered to date.