Uncategorized

  1. Animals

    50 years ago, DDT pushed peregrine falcons to the edge of extinction

    In 1969, peregrine falcons were at risk of extinction. But a ban on the pesticide DDT and new captive breeding programs allowed the raptors to recover.

    By Allie Wilkinson
  2. Life

    Slow sperm may fail at crashing ‘gates’ on their way to an egg

    A new study describes how sperm navigate narrow straits in the reproductive tract’s obstacle course to reach an egg.

    By Aimee Cunningham
  3. Planetary Science

    After 15 years on Mars, it’s the end of the road for Opportunity

    After 15 years of exploring Mars, a dust storm led to the demise of NASA’s longest-lived rover.