News

  1. Health & Medicine

    3-D mammograms are popular, but are they better than 2-D?

    The use of digital breast tomosynthesis, a newer breast cancer screening technology with limited evidence, has risen in recent years.

    By Aimee Cunningham
  2. Microbes

    Gut microbes might help elite athletes boost their physical performance

    Veillonella bacteria increased in some runners’ guts after a marathon, and may make a compound that might boost endurance, a mouse study suggests.

    By Carolyn Wilke
  3. Archaeology

    Capuchin monkeys’ stone-tool use has evolved over 3,000 years

    A Brazilian archaeological site reveals capuchins’ long history of practical alterations to pounding implements, researchers say.

    By Bruce Bower
  4. Astronomy

    The highest-energy photons ever seen hail from the Crab Nebula

    An experiment in Tibet spotted photons with over 100 trillion electron volts of energy.