News

  1. Life

    Baby’s first bacteria depend on birth route

    C-section newborns may harbor fewer helpful microbes than infants born vaginally.

    By Rachel Ehrenberg
  2. Anthropology

    Lucy fossil gets jolted upright by Big Man

    Scientists have unearthed a 3.6-million-year-old partial hominid skeleton that may recast the iconic species as humanlike walkers.

    By Bruce Bower
  3. Earth

    Even a newborn canyon is big in Texas

    A flood carved a surprisingly large gorge that may help understand features on Earth and Mars.

    By Sid Perkins
  4. Space

    Wet past for Red Planet

    An ocean blanketed one-third of Mars about 3.5 billion years ago, a new study suggests.

    By Ron Cowen
  5. Physics

    Physics in free fall

    Physicists drop supercold atoms down an elevator shaft to see what will happen.