Asteroid diversity points to a ‘snow globe’ solar system

Our solar system seems like a neat and orderly place, with small, rocky worlds near the sun and big, gaseous worlds farther out, all eight planets following orbital paths unchanged since they formed. However, the true history of the solar system is more riotous. Giant planets migrated in and out, tossing interplanetary flotsam and jetsam far and wide. New clues to this tumultuous past come from the asteroid belt.

Fuente : http://www.eurekalert.org/pub_releases/2014-01/hcf…