News

  1. Space

    Dry ice, wetter Mars

    A previously unknown reservoir of frozen carbon dioxide could periodically vaporize, thickening the atmosphere and allowing liquid water to flow on the Red Planet’s surface.

    By Ron Cowen
  2. Earth

    Ozone loss made tropics rainier

    Hole over Antarctica changes weather patterns all the way to the equator, simulations suggest.

    By Alexandra Witze
  3. Chemistry

    Pesticides tied to lower IQ in children

    Chemicals once sprayed in homes — and still used on farms — were found to have significant effects in three studies.

    By Janet Raloff
  4. Health & Medicine

    Flies on meth burn through sugar

    Cellular effects may explain why addicts often have a sweet tooth.