Rediscovering Spinosaurus: The first semi-aquatic dinosaur

Scientists have unveiled what appears to be the first truly semi-aquatic dinosaur, Spinosaurus aegyptiacus. New fossils of the massive Cretaceous-era predator reveal it adapted to life in the water some 95 million years ago, providing the most compelling evidence to date of a dinosaur able to live and hunt in an aquatic environment. The fossils also indicate that Spinosaurus was the largest known predatory dinosaur to roam the Earth, measuring more than 9 feet longer than the world’s largest Tyrannosaurus rex specimen.

The University of Chicago

Runtime: 4:23

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