Space.com - 10/2/13
GFP Commentary: Asteroids, meteors, and comets are often used to bring new life forms and codes to planets, as well as materials and water.
Earth got most of its water from asteroid impacts nearly 4.6 billion years ago, shortly after the solar system first took shape, a new study suggests.
Researchers studying a meteorite that fell to Earth in 2000 found evidence that the water in its parent asteroid disappeared soon after the space rock formed, when its insides were still warm. Asteroids that slammed into Earth several hundred million years after the solar system's birth were thus probably relatively dry, scientists said.
