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  1. Humans

    Letters from the September 11, 2004, issue of Science News

    Say what? I don’t think anyone should be surprised that squirrels have figured out how to say “nyah, nyah” to rattlesnakes (“Ultrasound alarms by ground squirrels,” SN: 7/3/04, p. 14: Ultrasound alarms by ground squirrels). After all, it’s what they’ve been saying to cats, dogs, and bird-feeder owning humans for years. R. Kelly WagnerAustin, Texas […]

    By Science News
  2. Chemistry

    Meteorites may have delivered phosphorus

    Meteorites may have supplied enough phosphorus to prebiotic Earth to spawn the first signs of life.

    By Alexandra Goho
  3. Physics

    Gold quantum dots

    Scientists have created a new type of quantum dot that could find applications in everything from biological imaging to computer displays.