End of planet formation marked by giant impacts
by Dr. Emily Baldwin, Astronomy Now Online, December 10, 2010.
Cataclysmic Collisions Brought Gold to Earth, Dec. 9, 2010
Giant asteroids could have delivered bling to early Earth Nature.com, December 9, 2010
New Insights Into Formation of Earth, the Moon, and Mars Science Daily, December 10, 2010
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.
A related article is:
Origin of Terrestrial Planets and-the Earth-Moon System