New Fossil Suggests T. Rex Got Smart Before It Got Big

Tyrannosaurus rex — the rock star of dinosaurs, the apex predator that beats them all — it turns out was descended from smaller and, well, nerdier stock. That's the conclusion based on a new fossil find that has helped scientists to bridge the gap between the giant of the movies and its much older, much smaller ancestor. The findings are reported in this week's Proceedings of the National Academy of Sciences. The ancestor to the T. rex was discovered in a fossil-rich area of...

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