End of planet formation marked by giant impacts

by Dr. Emily Baldwin, Astronomy Now Online, December 10, 2010.

http://www.astronomynow.com/news/n1012/10impact/

Cataclysmic Collisions Brought Gold to Earth, Dec. 9, 2010‎

http://news.nationalgeographic.com/news/2010/12/101209-asteroid-collisions-earth-gold-science-space/


http://www.cbsnews.com/8301-501465_162-20025262-501465.html

http://sify.com/news/study-says-alien-bombardment-brought-gold-to-earth-news-international-kmknawcebdj.html

Giant asteroids could have delivered bling to early Earth Nature.com, December 9, 2010

‎http://blogs.nature.com/news/thegreatbeyond/2010/12/giant_asteroids_could_have_del.html

New Insights Into Formation of Earth, the Moon, and Mars Science Daily, December 10, 2010
http://www.sciencedaily.com/releases/2010/12/101209141130.htm

The paper is:
Bottke, W. F., R. J. Walker, J. M. D. Day, D. Nesvorny, and L. E. Tanton, 2010, Stochastic Late Accretion to Earth, the Moon, and Mars. Science. vol. 330, no. 6010, pp. 1527-1530.
http://www.sciencemag.org/content/330/6010/1527

A related article is:
Origin of Terrestrial Planets and-the Earth-Moon System
 http://groups.csail.mit.edu/mac/users/wisdom/extrasolar/Canup.pdf

Yours, 

Paul H.