News

  1. Earth

    Satellites could help track sea level

    Experiments that used signals from Global Positioning System satellites to precisely measure altitude above a lake's surface may pave the way for fleets of spaceborne sensors that can quickly and inexpensively monitor local and global changes in sea level.

    By Sid Perkins
  2. Health & Medicine

    Rwandan patients show unusual HIV

    Blood tests on people in Rwanda who have had HIV infections for years without symptoms of AIDS indicate that the viruses in these patients have rare mutations.

    By Nathan Seppa
  3. Health & Medicine

    Will new approach cure Chagas disease?

    Scientists may be able to disable the parasite that causes Chagas disease by targeting the enzyme it uses to make essential fats.