A massive prehistoric reptile fossil discovered in central Nevada could shed light on how the Earth rebounded after a mass extinction, according to a report published in the Proceedings of the National Academy of Sciences. The findings could help with future ecosystem recovery. The existence of a top predator like Thalattoarchon saurophagis, informally dubbed the Tyrannosaurus rex of the sea, is a sign that the predator-prey chain was complete 8 million years after the mass extinction.

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