News

  1. Health & Medicine

    Coronary calcium may predict death risk

    The amount of calcium in the coronary arteries can serve as a risk marker for people who are otherwise without heart disease symptoms.

    By Nathan Seppa
  2. Earth

    New mantle model gets the water out

    A novel notion of geophysical processes taking place deep within our planet may explain why the upper layer of Earth's mantle is relatively depleted of many trace elements.

    By Sid Perkins
  3. Astronomy

    Solar system replica?

    Carefully monitoring the motion of a star 90 light-years from Earth, astronomers have found what may be the closest analog known to our solar system.

    By Ron Cowen
  4. Health & Medicine

    Grades slipping? Check for snoring

    Children who snore frequently are more likely to struggle with their schoolwork than are children who rarely snore.