- The fearsome tyrannosaur dinosaurs that ruled the northern hemisphere during the Late Cretaceous period (66-100 million years ago) may not have been solitary predators as popularly envisioned, but social carnivores similar to wolves, according to a new study. https://arkansasresearch.uark.edu/fearsome-tyrannosaurs-were-social-animals-study-suggests/ 6 comments science
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