These dinosaur tracks, found in a Polish quarry, are probably the earliest evidence we have of dino life on Earth. They predate all known bones. This photo is part of a article from ScienceNews about the evolutionary origins of dinosaurs. Everybody always wants to know how they died out. But do you know where they came from? The story is really fascinating.
Via David Despain
Photos by G. Niedźwiedzki, S.L. Brusatte et al / Proceedings of the Royal Society B 2010
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