Uncategorized

  1. Earth

    Oxygen wafted into Earth’s atmosphere earlier than thought

    Date pushed back to 3 billion years ago, suggesting photosynthesis had evolved by then.

    By Jessica Shugart
  2. Life

    Immune protein explains skin diseases’ link to infection

    Molecule called IL-29 protects people with psoriasis from viruses.

    By Tina Hesman Saey
  3. Psychology

    Mental rotation gears up by age 5 for both boys and girls

    Kid-friendly test suggests that the ability to visualize objects from different angles starts early.

    By Bruce Bower
  4. Health & Medicine

    Dextrose rub helps newborns with low blood sugar

    Massaging the sugary gel into babies’ mouths may lessen the need for intravenous infusions of glucose, a study shows.