News

  1. Planetary Science

    Sun grazers: A thousand comets and counting

    An amateur astronomer analyzing images from the Solar and Heliospheric Observatory has found the 999th and 1,000th comets detected by the craft.

    By Ron Cowen
  2. Tech

    Light sensor may improve battlefield tools

    A new microscale ultraviolet-light sensor could help shrink the size of some military field systems used for detecting biowarfare agents and clandestine communications to the dimensions of a cell phone.

    By Peter Weiss
  3. Earth

    Save the frogs

    Researchers have drafted a proposed $400 million research-and-rescue plan for the world's amphibians, at least half of which are in decline or even facing serious risk of extinction.

    By Janet Raloff
  4. Humans

    Anti-TB spending abroad could save money overall

    Investing $44 million in tuberculosis-control programs in Mexico, Haiti, and the Dominican Republic might save the United States nearly triple that amount over the next 20 years.