News

  1. Health & Medicine

    Heart damage tied to immune reaction

    Researchers in Brazil have identified immune proteins that flood the heart tissues of many people with Chagas disease, suggesting a cause of this deadly complication of the parasitic tropical disease.

    By Nathan Seppa
  2. Astronomy

    Pluto or bust?

    A new National Research Council report may revive plans to send a spacecraft to explore Pluto and its neighborhood.

    By Ron Cowen
  3. Paleontology

    Unknown creature made birdlike tracks

    Paleontologists have found a multitude of birdlike footprints left by a yet undiscovered creature in rocks more than 60 million years older than Archaeopteryx, the first bird to have left fossils of its body parts.