The massive carnivorous dinosaur Spinosaurus is at the center of a fierce paleontological debate. Was this “heron from hell” a shallow-water wader, or a proficient pursuit predator that swam through ancient rivers like a crocodile? A series of groundbreaking fossil discoveries, including a unique paddle-like tail and unusually dense bones, are fueling the controversy and forcing scientists to rethink just how aquatic this bizarre creature truly was.
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