News

  1. Health & Medicine

    Coagulation factor XI boosts clot risk

    People who have had a major blood clot in a vein are roughly twice as likely to harbor high concentrations of blood coagulation factor XI as people who haven't.

    By Nathan Seppa
  2. Health & Medicine

    Myopia link to night lights doubted

    Two studies cast doubt on the apparent link between night lights in a baby's nursery and an increased risk of being nearsighted later in childhood.

    By Nathan Seppa
  3. Astronomy

    X-ray telescope vanishes

    Astro-E, a Japanese X-ray observatory, fell back to Earth and burned up just after launch on Feb. 9.

    By Ron Cowen
  4. Planetary Science

    Unveiling Mars’ watery secret

    A new gravity map of Mars has revealed a network of buried channels that billions of years ago may have been on the surface and helped carry water to fill an ancient ocean.