Notebook

  1. Earth

    Most of Earth’s impact craters await discovery

    Hundreds of undiscovered impact craters probably dot Earth’s surface, new research estimates.

    By Thomas Sumner
  2. Animals

    Moon jellies muscle their way to recovery

    Symmetrization, using rapid muscle movements to repair body symmetry, is the go-to healing mechanism for the limbed stage of moon jellyfish.

    By Teresa Shipley Feldhausen
  3. Animals

    How a trap-jaw ant carries a baby

    Powerful jaws make the Odontomachus brunneus ant a skilled escape artist.

    By Susan Milius
  4. Science & Society

    Tech in the classroom foreseen 50 years ago

    Fifty years ago, scientists were looking forward to technology in the classroom.