A paper published Wednesday takes recent research on how mammals move and applies it to dinosaurs
. Its conclusions support theories that the massive meat-eaters hunted in packs and opens a window into the ecology of the ancient forests they roamed.
To figure out how much T. rex needed to eat, the scientists first had to figure out how it moved, including how fast it could run.“That, coupled with body mass, can tell us a lot about speed,” Mr. Larsson said. But, he adds, T. rex’s long legs would have made that a very efficient 20 km/h, a pace that could be kept up for quite a while.“If this were their mode of hunting, being able to go much greater distances at a pretty good clip, what kind of lifestyle would that be? The animals that do this today are ones, like wolves, that hunt in packs.”Near Red Deer, Alta., a group of many large, meat-eating dinosaur fossils appear to be from members of a single flock.
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