Uncategorized

  1. Animals

    A scientist used chalk in a box to show that bats use sunsets to migrate

    A new device for investigating bat migration suggests that the flying mammals orient themselves by the setting sun.

    By Yao-Hua Law
  2. Neuroscience

    The herbal supplement kratom comes with risks

    The supplement kratom can cause heart racing and agitation.

    By Laura Sanders
  3. Earth

    More than a million tiny earthquakes revealed in Southern California

    By putting millions of tiny quakes on record, scientists hope to learn more about what triggers the big ones.

    By Carolyn Gramling
  4. Genetics

    A genetic scorecard could predict your risk of being obese

    A genetic score predicts who is at risk of severe obesity, but experts say lifestyle matters more than genes.