The dreaded dinosaur Allosaurus was the scourge of the Jurassic Period landscape some 150 million years ago, an apex predator just as Tyrannosaurus rex was 80 million years later during the Cretaceous Period. The researchers unearthed 2,368 fossil bones including several different dinosaurs and other creatures. Remarkably, 29% of the bones bore evidence of bite marks, a much-higher percentage than usual, indicative of heavy scavenging in what may have been a stressed ecosystem caused by a seasonal drought or potentially a wildfire.
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