The arms ofT rex likely shrank in length as an adaptation to prevent amputations when a pack of the mighty dinosaurs descended on carcasses with their massive heads and bone-crushing teeth, a new study has suggested.
Recent research, based on fossils recovered from a mass dinosaur grave in Utah, suggested that Tyrannosaurs may have hunted in packs, pursuing their prey together, as opposed to popular assumptions that they were solitary apex predators.
