Scientists confirmed this week that rocks collected recently in the Moroccan desert came from the Red Planet. A little-known fact is that each year Earth is hit by by half a dozen or so one-pound or larger rocks that were blasted off the surface of Mars by large impacts and found their way into Earth-crossing orbits. Nearly 10% of all rocks blasted off into space from the Red Planet end up crashing into Earth.
Sunday, January 22, 2012
Weekend Feature: NASA's Search for Extraterrestrial Genomes --Was There an Earth-to-Mars Microbe Shuttle?
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