News

  1. Health & Medicine

    Concern expands over Zika birth defects

    Infection with Zika virus in utero can trigger a spectrum of birth defects beyond microcephaly, and could potentially cause long-term health problems as well.

    By Meghan Rosen
  2. Paleontology

    Ancient microbe fossils show earliest evidence of shell making

    Armor-plated, 809-million-year-old fossilized microbes discovered in Canada are the oldest known evidence of shell making.

    By Thomas Sumner
  3. Animals

    New case emerging for Culex mosquito as unexpected Zika spreader

    The much-debated proposal that a Culex mosquito could help spread Zika gets some international support.

    By Susan Milius
  4. Planetary Science

    Mercury’s surface still changing

    A population of small cliffs on Mercury suggests that the planet might have been tectonically active in the last 50 million years.