Dinosaurs emerged in Triassic, a geological period of the Mesozoic era which started 252 Mya. It was then when archosaurs split into two evolutionary branches – bird-like and crocodile-like. An international group of researchers has discovered that the most ancient dinosaurs’ ancestors  were quadrupedal [Credit: Kazan Federal University]Dinosaurs’ closest Ancestors were at the base of the bird branch. Many scientists have...

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