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© Courtesy of the Bureau of Land Management Hollywood specimen, same species as Teratophoneus, discovered approximately two miles north of the Rainbows and Unicorns Quarry on Grand Staircase-Escalante National Monument. 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. The finding, based on research at a unique fossil bone site inside Utah s Grand Staircase-Escalante National Monument containing the remains of several dinosaurs of the same species, was made by a team of scientists including Celina Suarez, U of A associate professor of geosciences.

United statesDaigo yamamuraJoe sertichAlan titusCelina suarezPhilip currieBureau of land managementJames cook universityEscalante national monumentDenver museum of natureUs bureau of land managementColby college of maineDenver museum of nature scienceUniversity of arkansasLand managementGrand staircase escalante national