Uncategorized

  1. Chemistry

    Feline stimulant fends off mosquitoes

    Preliminary results suggest that catnip may be more effective at repelling mosquitoes than the widely used chemical DEET.

    By Jessica Gorman
  2. Astronomy

    Galaxy’s Black Hole: X Rays Mark Spot

    An X-ray outburst from the center of our galaxy is providing compelling new evidence that a monster black hole lurks at the Milky Way's core.

    By Ron Cowen
  3. Health & Medicine

    Immunity’s Eyes

    Proteins called toll-like receptors allow human immune cells to detect microbes.

    By John Travis
  4. Earth

    Aircraft spies on health of coral reefs

    Marine ecologists report the development of a new remote-sensing system that can assess the health of coral reefs from planes.