Uncategorized

  1. Health & Medicine

    When Flu Flies the Coop

    Scientists are tracking the spread of a threatening influenza virus in birds and exploring strategies that could be used to halt a potential outbreak in people before it explodes into a global epidemic.

    By Ben Harder
  2. Astronomy

    Deep Impact

    Data from the Deep Impact mission reveal that the bullet that slammed into Comet Tempel 1 on July 4 excavated material that likely hadn't seen the light of day since the birth of the solar system 4.5 billion years ago.

    By Ron Cowen
  3. Math

    Fermat’s Natural Spirals

    Using points to trace out spirals produces intriguing secondary patterns.

    By Ivars Peterson
  4. Earth

    Changing Earth

    Developed by the Smithsonian Institution’s National Museum of Natural History, this Web site focuses on Earth’s history.