Theory #1 -Based on the discovery of a 240-million-year-old fossil archosaur, paleontologists theorize that dinosaurs split off early from the crocodile family tree. The journal Nature describes Asilisaurus kongwe as a dog-sized, plant-eating dinosaur precursor. Asilisaurus lived during the Triassic period, when crocodile-like beasts ruled the Earth, with dinosaurs becoming dominant some 35 million years later. Theory #2 - Almost 20 years of research on the morphology of birds and dinosaurs sup
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