Whoa now... take a look at any skeletal diagram of a tyrannosaur's legs. See how much they look like ostrich legs? It's well known that the aforementioned bird can run rather quickly, and there is no animal on earth that possesses legs like an ostrich that is incapable of running at a decent clip; the simple fact that T. Rex was an extremely large creature wouldn't change that. Furthermore, this is absolutely a killing machine - the arms are on their way out from an evolutionary standpoint not because the dinosaur was a lazy scavenger (which would have been nearly impossible given its size and warmblooded nature) but because all the musculature and "firepower" was being focused in its head and upper torso. In a few million more years (as though that were really such a short length of time - evolution ain't overnight even in punctuated equilibrium), these animals would have no arms whatsoever and possess jaws that made their predecessors look almost like friendly puppies by comparison (well, almost). ^_^
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Whoa now... take a look at any skeletal diagram of a tyrannosaur's legs. See how much they look like ostrich legs? It's well known that the aforementioned bird can run rather quickly, and there is no animal on earth that possesses legs like an ostrich that is incapable of running at a decent clip; the simple fact that T. Rex was an extremely large creature wouldn't change that. Furthermore, this is absolutely a killing machine - the arms are on their way out from an evolutionary standpoint not because the dinosaur was a lazy scavenger (which would have been nearly impossible given its size and warmblooded nature) but because all the musculature and "firepower" was being focused in its head and upper torso. In a few million more years (as though that were really such a short length of time - evolution ain't overnight even in punctuated equilibrium), these animals would have no arms whatsoever and possess jaws that made their predecessors look almost like friendly puppies by comparison (well, almost). ^_^