News

  1. Tech

    Double-decker solar cell

    A two-layer, polymer-based solar cell has good efficiency and could be cheap to mass-produce.

    By Davide Castelvecchi
  2. Planetary Science

    Hyperion’s hydrocarbons

    New observations by the Cassini spacecraft indicate the presence of ice and solid carbon dioxide on Saturn's moon Hyperion, and suggest an explanation for the orb's spongelike appearance.

    By Ron Cowen

  3. Alcohol problems hit nearly 1 in 3 adults

    Nearly one in three recently surveyed U.S. adults reports having had serious alcohol problems at some time in their lives.

    By Bruce Bower
  4. Health & Medicine

    Brain stem cells help Parkinson’s monkeys

    Transplants of human-brain stem cells triggered signs of improvement in monkeys with a Parkinson's disease–like disorder.