News

  1. Paleontology

    How did Triceratops grow its horns?

    Newly discovered fossil skulls of juvenile Triceratops may help reveal how the dinosaurs grew their three trademark horns.

    By Sid Perkins
  2. Paleontology

    Fossils found under tons of Kitty Litter

    Excavations at North America's largest Kitter Litter mine have yielded fossils of ancient aquatic reptiles, as well as evidence of a tsunami generated by the extraterrestrial impact that killed off the dinosaurs about 65 million years ago.

    By Sid Perkins
  3. Health & Medicine

    Pregnancy spurs a tumor suppressor

    Pregnancy hormones may prime breast cells to maintain a supply of p53, a cancer suppressor protein, thus accounting for why women who have undergone pregnancy generally have a lower breast cancer risk than do others.