News

  1. Paleontology

    Newfound fossils in China highlight a dizzying diversity of Cambrian life

    A new treasure trove of Cambrian fossils in China dating to 518 million years ago could rival Canada’s Burgess Shale.

    By Carolyn Gramling
  2. Health & Medicine

    Saving monkey testicle tissue before puberty hints at a new way to preserve fertility

    Frozen testicle tissue samples from prepubescent monkeys transplanted back onto those monkeys once they matured produced sperm.

    By Aimee Cunningham
  3. Health & Medicine

    A new ketamine-based antidepressant raises hope — and questions

    Little is known about the long-term effects on people of a newly approved antidepressant based on the anesthetic ketamine.

    By Laura Sanders
  4. Astronomy

    X-ray ‘chimneys’ connect the Milky Way to mysterious gamma-ray bubbles

    Two columns of X-rays that are hundreds of light-years long could explain the existence of giant bubbles of energetic light that sandwich the galaxy.