A little asteroid turns out to be a planetary building block that stopped growing.<img src="http://feeds.feedburner.com/~r/DiscoveryNews-Top-Stories/~4/UN4xQd_CDkI" height="1" width="1"/>
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A little asteroid turns out to be a planetary building block that stopped growing.<img src="http://feeds.feedburner.com/~r/DiscoveryNews-Top-Stories/~4/UN4xQd_CDkI" height="1" width="1"/>