News

  1. Planetary Science

    Spacecraft reveal Mars’ molten heart

    Tracking the precise motion of a spacecraft orbiting Mars, planetary scientists have deduced that the core of the Red Planet is at least partially liquid.

    By Ron Cowen
  2. Health & Medicine

    Prenatal marijuana exposure may pose health risks

    Rats that were exposed to a marijuana-related chemical while in the womb show more memory lapses and hyperactivity than unexposed rats do.

    By Nathan Seppa
  3. Earth

    Ssshhh! South Pole has a new seismic station

    Seismometers recently installed near the South Pole reveal that the area is the quietest spot on the planet for eavesdropping on earthquakes.

    By Sid Perkins
  4. Health & Medicine

    Morbid Mystery Tour: Epidemic from China is encircling globe

    An outbreak of deadly pneumonia that apparently began in southern China spread in March to at least two other continents, including North America.