News

  1. Life

    Select cells appear to spawn tumors

    Separate studies support the theory that stem cells cause cancers to emerge and recur.

    By Tina Hesman Saey
  2. Health & Medicine

    Alzheimer’s protein could help in MS

    A-beta, the same molecule that has been tied to dementia when it accumulates in the brain, appears to reduce damage when introduced to the bodies of mice with symptoms of multiple sclerosis.

    By Laura Sanders
  3. Humans

    DNA hints at African cousin to humans

    Complete genetic profiles of people from three hunter-gatherer groups suggest Homo sapiens interbred with a now-extinct species on the continent relatively recently.

    By Tina Hesman Saey
  4. Planetary Science

    Curiosity readies for dramatic entrance

    NASA’s new Mars rover aims to alight on the Red Planet like a pop star being lowered onto stage.