Uncategorized

  1. Astronomy

    Super Portrait: X-ray telescope eyes supernova remnant

    Trained on Cassiopeia A for 11.5 days, NASA's Chandra X-ray Observatory has taken the most detailed portrait ever recorded of any supernova remnant.

    By Ron Cowen
  2. Earth

    Rounding Up Resistance: Weed sacrifices seeds to put up with a herbicide

    Use of herbicides containing glyphosate can drive evolution in the tall morning glory, even though the weed must simultaneously sacrifice a measure of its fertility.

    By Ben Harder
  3. Materials Science

    Face to Face: Crystal-growth method bodes electric payoff

    A new method for growing silicon carbide eliminates crystal defects that have long prevented the compound's wider use in electric devices.

    By Peter Weiss
  4. Health & Medicine

    Vitamin may guard against mental decline

    The B vitamin niacin may protect people against Alzheimer's disease and other forms of mental decline.