Uncategorized

  1. Astronomy

    Cosmic Push: X-ray study confirms universe’s dark side

    Culling clues from X rays emitted by distant clusters of galaxies, astronomers report new evidence that some mysterious force overcame gravity's tug about 6 billion years ago and ever since has been pushing galaxies apart at an accelerating rate.

    By Ron Cowen
  2. Earth

    Big Thaw Coming: Climate change may slam Arctic

    If the changes in climate predicted for this century come to pass, the people and creatures of the Arctic will face some of the largest challenges.

    By Sid Perkins
  3. Humans

    Letters from the May 29, 2004, issue of Science News

    Judging by science “Forensics on Trial” (SN: 3/27/04, p.