News

  1. Health & Medicine

    Why more male than female newborns may get the crucial vitamin K shot

    Vitamin K lowers the risk of bleeding, including in a circumcision. That procedure may explain a disparity in which infants are more likely to get the shot.

    By Aimee Cunningham
  2. Health & Medicine

    A popular sunscreen ingredient can finally be sold in the United States

    The FDA will allow bemotrizinol in sunscreen. The chemical is long-lasting and defends against solar radiation that ages skin.

    By Meghan Rosen
  3. Chemistry

    A new method could spot fentanyl variants no one has cataloged yet

    Researchers used machine learning to help predict chemical signatures for over 1 billion possible fentanyls, including variants never seen before.