News

  1. Anthropology

    People fired up Aussie extinctions

    Early Australian settlers may have altered the continent's landscape around 50,000 years ago, leading to the extinction of many animal species.

    By Bruce Bower
  2. Astronomy

    Core mystery

    Despite new images from the Hubble Space Telescope, the brightest known supernova of the past 400 years remains a puzzle for astronomers.

    By Ron Cowen
  3. Astronomy

    Triple Play: A planet with three suns

    Three suns grace the skies above a newly found, Jupiterlike extrasolar planet, posing a puzzle for how massive planets form in a closely-knit, multiple-star system.

    By Ron Cowen
  4. Physics

    Realistic Time Machine? New design could forgo exotic ingredient

    A novel time machine concept may avoid a problem of earlier, less-practical proposals by requiring only normal matter and the vacuum known to exist in space.