News

  1. Health & Medicine

    After 40 years of AIDS, here’s why we still don’t have an HIV vaccine

    The unique life cycle of HIV has posed major challenges for scientists in the search for an effective vaccine.

    By Erin Garcia de Jesús
  2. Paleontology

    Something mysteriously wiped out about 90 percent of sharks 19 million years ago

    Deep sediments beneath the Pacific Ocean revealed a mystery: a massive shark die-off with no obvious cause.

    By Carolyn Gramling
  3. Animals

    Newly recognized tricks help elephants suck up huge amounts of water

    New ultrasound imaging reveals what goes on inside a pachyderm’s trunk while feeding. It can snort water at the rate of 24 shower heads.