News

  1. Earth

    Early Earth’s chlorine blown away by giant impacts

    Low levels of chlorine on planet's surface have long puzzled scientists.

    By Erin Wayman
  2. Life

    Mutation makes H5N1 flu lose its grip

    Laboratory-added genetic change makes avian influenza unable to bind to bird cells.

    By Tina Hesman Saey
  3. Life

    Why corals do calisthenics

    Pulsating motion appears to flush water to improve photosynthetic efficiency in symbiotic algae.

    By Susan Milius
  4. Health & Medicine

    Circumcision changes penis biology

    Altered mix of microbes might reduce susceptibility to viral infections.

    By Nathan Seppa
  5. Psychology

    Disputed signs of consciousness seen in babies’ brains

    Within five months of birth, infants produce a possible neural marker of being aware of what they see.