Uncategorized

  1. Earth

    Glass bits, charcoal hint at 56-million-year-old space rock impact

    Glassy debris and the burnt remains of wildfires suggest that a large space rock hit Earth near the start of the Paleocene-Eocene Thermal Maximum warming event around 56 million years ago.

    By Thomas Sumner
  2. 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
  3. 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
  4. Astronomy

    Solar system sits within major spiral arm of Milky Way

    The solar system appears to live in one of the major spiral arms of the Milky Way, not in an offshoot as previously thought.