News

  1. Earth

    Nature’s Own: Ocean yields gases that had seemed humanmade

    Chemical analyses of seawater provide the first direct evidence that the ocean may be a significant source of certain atmospheric gases that scientists had previously assumed to be produced primarily by industrial activity.

    By Sid Perkins
  2. Astronomy

    X-Ray Chaos: Violence shows itself in a nearby galaxy

    New X-ray observations provide additional evidence that Centaurus A, the nearest radio-wave-emitting galaxy to Earth that has a supermassive black hole, is a maelstrom of violence.

    By Ron Cowen
  3. Earth

    Killer Cocktails: Drug mixes threaten aquatic ecosystems

    Trace amounts of pharmaceutical drugs in waterways may work together to deform and kill native microscopic organisms.