News

  1. Health & Medicine

    Sirtuin shown to control gene activity

    A previously overlooked protein called SIRT6 provides some molecular clues to aging.

    By Tina Hesman Saey
  2. Humans

    Migrants settled New World in tandem

    A genetic investigation of two rare types of mitochondrial DNA in Native Americans suggests that people first entered the Americas in two groups, following separate routes.

    By Bruce Bower
  3. Space

    Tuned in to new noise from the cosmos

    Unexplained radio noise may be signals from the early universe.

    By Ron Cowen
  4. Life

    Fifty-two things to do with a bat wing

    Bats swim, run, flirt and do lots of other nonflight jobs with their wings -- a fact that may have influenced evolution of the wing's architecture.