![]() It’s a first-of-its-kind number, but just an estimate with a margin of error that is the size of a T rex. Using calculations based on body size, sexual maturity and the creatures’ energy needs, a team at the University of California, Berkeley, figured out just how many T rex lived over 127,000 generations, according to a study in the journal Science on Thursday. ![]() That’s how many of the fierce dinosaur king probably roamed Earth over the course of a couple of million years, a new study finds. One Tyrannosaurus rex seems scary enough. ![]()
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