The over 3-foot-long marine predator sat at the top of Earth's first food chain.<img src="http://feeds.feedburner.com/~r/DiscoveryNews-Top-Stories/~4/c704P4-0M1Y" height="1" width="1"/>
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The over 3-foot-long marine predator sat at the top of Earth's first food chain.<img src="http://feeds.feedburner.com/~r/DiscoveryNews-Top-Stories/~4/c704P4-0M1Y" height="1" width="1"/>