Notebook

  1. Planetary Science

    50 years ago, an Earth-based telescope spotted Saturn’s fourth ring

    Scientists now rely on spacecraft to chart the intricate rings of the gas giant.

    By Emily Conover
  2. Animals

    Blennies have a lot of fang for such little fishes

    Unlike snakes, blennies evolved fangs before venom, through probably not because of any need to hunt big prey.

    By Susan Milius
  3. Earth

    Ice particles shaped like lollipops fall from clouds

    Small ice particles called ice-lollies, because of their lollipop-like appearance, can form in clouds.

    By Thomas Sumner
  4. Animals

    50 years ago, U.S. fell short on mosquito eradication

    Researchers boldly predicted mosquitoes’ demise 50 years ago.