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*Yet another fossil of a T-Rex ancestor, Raptorex Kriegsteini, w--H-'" or Raptorex as scientists have dubbed it, also lived in what is now China. It lived around 125 million years ago, and looks like aT-Rex in miniature. At around one-fifth the length of T-Rex and a mere 1/100th of its overall size, this 8-foot long raptorex roamed the earth around 40 million years before Tyrannosaurus Rex enters the fossil record.
*T-Rex enjoyed its status as top predator for about 20 million years at the end of the Cretaceous, the last years of the dinosaurs.
*Don't bother me, I won't bother you: T-Rex lived at a time when another very large predator was around: Spinosaurus. Yet DNA tests on fossilized stomach contents for spinosaurus shows that Spinosaurs spent almost all their time in water, which solves the problem of how the two lived at the same time and in the same places without constantly fighting with each other: they avoided one another. Tyrannosaurus pretty much stuck to land, and spinosaurus to the water.
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