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Did tyrannosaurs live in groups? Experts discuss new fossil clues. A new fossil site reveals a group of tyrannosaurs that died together, providing fresh evidence that these predators engaged in some form of social behavior. ByMichael Greshko Email In July 2014, researchers looking for fossil turtles in southern Utah’s public lands found hints of a “monstrous murderer”: the ankle bone of a tyrannosaur named Teratophoneus. Within hours, they had brushed through the sand between pinyon junipers and found the jumbled remains of multiple Teratophoneus all of which seemed to have died in the same place, at the same time. Scientists unveiled the site to the world in a study published last Tuesday in the scientific journal

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