Day 08: Another good one for the study of evolution, Aardonyx celestae is a bit like a bipedal Diplodocus. Although it lived at the same time as a lot of the more familiar-looking sauropods, so didn't evolve into them, it seems to have been a bit of a throwback to an earlier type of dinosaur, and helps us understand how the earlier, bipedal animals gradually evolved into the tree-trunk-legged quadrupeds that everybody knows.

Here's a picture of it, by the great Julius Csotonyi.


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