News

  1. Astronomy

    Enlarging a Mars photo album

    A new set of more than 18,000 images of Mars, posted online in early October, features the sharpest picture of the Red Planet ever taken by an orbiting spacecraft.

    By Ron Cowen
  2. Tech

    Triggering genes in a flash

    A light pulse can activate or deactivate selected genes in cells.

    By Peter Weiss
  3. Health & Medicine

    Hidden Effect? Hypertension risk linked to common, over-the-counter pain relievers

    Women who take ibuprofen or acetaminophen for headaches or inflammation boost their chances of developing high blood pressure.

    By Nathan Seppa
  4. Astronomy

    Iron-Poor Star: Closing in on the birth of the first stars

    Astronomers have found a star so old and metal poor that its chemical composition carries vestiges of the origin of our galaxy.