Uncategorized

  1. Earth

    A limit for carbon emissions: 1 trillion metric tons

    To reduce risks of severe damage from climate change, humans should burn no more than 1 trillion tons of carbon in total, researchers suggest.

    By Sid Perkins
  2. Life

    Connectivity may play role in autism

    Large studies of autism suggest connections between neurons are the culprit.

    By Tina Hesman Saey
  3. Life

    Mimivirus up close

    Scientists get a closer look at the structure of mimivirus, the largest virus in the world.

    By Rachel Ehrenberg
  4. Humans

    Obama pledges 3 percent of GDP for research

    BLOG: Highlights of what the president announced to the National Academy of Sciences.