NASA: Anyone seen all the moon rock we've lost?

Space agency declares that over 500 pieces of moon rock and other space substances are unaccounted for.

Source: http://news.cnet.com/8301-17852_3-57340100-71/nasa-anyone-seen-all-the-moon-rock-weve-lost/?part=rss&subj=news&tag=2547-1_3-0-20

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