Asteroid Belts at Just the Right Place are Friendly to Life
November 01, 2012
They suggest that the size and location of an asteroid belt, shaped by the evolution of the sun's planet-forming disk and by the gravitational influence of a nearby giant Jupiter-like planet, may determine whether complex life will evolve on an Earth-like planet.
This might sound surprising because asteroids are considered a nuisance due to their potential to impact Earth and trigger mass extinctions. But an emerging view proposes that asteroid collisions with planets may provide a boost to the birth and evolution of complex life.
More - Link >>> http://www.jpl.nasa.gov/news/news.php?release=2012-345&cid=release_2012-345
Source: Jet Propulsion Laboratory, NASA.
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