News

  1. 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
  2. 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
  3. 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.

    By Peter Weiss
  4. Earth

    Pollution Ups Blood Pressure: Inhaled particles linked to transient effect

    In a laboratory setting, volunteers breathing pollutants generated by sources such as vehicle engines experience slight but steady increases in blood pressure.