News

  1. Astronomy

    Astronomers find evidence of missing matter

    Astronomers say they've likely confirmed that half of the hydrogen gas in the universe, which had not been accounted for, resides in relatively nearby reaches of intergalactic space.

    By Ron Cowen
  2. Earth

    U.S. smog limit permits subtle lung damage

    Ambient concentrations of smog ozone in many regions can cause lungs to leak, potentially compromising the health of even robust people.

    By Janet Raloff
  3. Paleontology

    Fossils Hint at Who Left Africa First

    Fossil skulls found in central Asia date to 1.7 million years ago and may represent the first ancestral human species to have left Africa.

    By Bruce Bower
  4. Animals

    Upside Way Down: Video turns fish story on its head

    The first video of whipnose anglerfish reveals them swimming upside down and trolling for prey on the 5,000-meter deep ocean floor.