Uncategorized

  1. 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.

    By Sid Perkins
  2. Health & Medicine

    Gene might contribute to asthma risk

    Variations in a gene called ADAM33 may predispose a person to asthma.

    By Nathan Seppa
  3. Chemistry

    Material could halt catalyst waste

    New research suggests a way that carmakers might use less of expensive metal materials in automobiles' catalytic converters.

    By Jessica Gorman
  4. Health & Medicine

    Hormone therapy falls out of favor

    Several studies now indicate that health risks associated with hormone replacement therapy for postmenopausal women outweigh its benefits.