This is a very cool fossil, a tiny T. rex cousin called Raptorex. Well, tiny is relative — it was still as big as a human being — but it has the same proportions, the oversized fanged head, the tiny forelimbs, etc., as it's later relative, T. rex. It's simply adorable, in a viciously evil predatory sort of way. Apparently the tyrannosaur body plan was successful at different scales.
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If you have not already had a chance to see it, the T. Rex Autopsy airing on the National Geographic channel is a must-see! They literally created a model of T. Rex based on available evidence about T.
tags: evolutionary biology, evolutionary biogeography,