News

  1. Earth

    Gassy volcanoes tied to mass extinction

    Chemicals from a massive Siberian eruption 250 million years ago may have polluted the atmosphere and killed off most life on the planet.

    By Alexandra Witze
  2. Life

    Mice missing protein burn more fat

    Research on the receptor for the 'hunger hormone' suggests a molecular strategy for revving up the body’s furnace.

    By Tina Hesman Saey
  3. Health & Medicine

    Salvia says high

    Laboratory researchers show that the psychoactive substance in a popular, largely legal recreational drug causes a short but intense period of hallucination.

    By Laura Sanders
  4. Humans

    Apartments share tobacco smoke

    Children in nonsmoking families have higher levels of secondhand exposure if they live in multifamily dwellings.