Uncategorized

  1. Animals

    Skin Chemistry: Poison frogs upgrade toxins from prey

    For the first time, scientists have found a poisonous frog that takes up a toxin from its prey and then tweaks the chemical to make it a more deadly weapon.

    By Susan Milius
  2. Astronomy

    Hubble Highlights a Riddle: What’s the source of quick-return comets?

    New observations from the Hubble Space Telescope demonstrate that scientists don't know where a major class of comets comes from.

    By Ron Cowen
  3. Planetary Science

    Cozying up to Mars

    The Hubble Space Telescope photographed Mars on Aug. 27 when the planet came closer to Earth than it had in nearly 60,000 years, enabling the telescope to take the sharpest global image of Mars ever taken from Earth's vicinity.