Feature

  1. Planetary Science

    How to keep humans from ruining the search for life on Mars

    As the race to put humans on Mars heats up, researchers worry they are running out of time to find life on the Red planet.

    By Lisa Grossman
  2. Health & Medicine

    Hormone replacement makes sense for some menopausal women

    For healthy women within 10 years of menopause, the benefits of hormone therapy for relief of hot flashes or other symptoms may outweigh the risks.

    By Aimee Cunningham
  3. Science & Society

    Colliding neutron stars, gene editing, human origins and more top stories of 2017

    A gravitational wave discovery is the year's biggest science story — again.