Palaeobiology

4X4: skeleton of dinosaur dug up in Silesia indicates ancestors of dinosaurs were four legged, not two

On all fours: research on Silesaurus may change the theory of dinosaur evolution. Shalom/ Creative Commons Attribution 3.0 Unported license

It has long been thought the great reptiles evolved from two-legged animals but the Silesaurus could change all that.

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