Dinosaurs ended — and originated — with a bang!

It is commonly understood that the dinosaurs disappeared with a bang — wiped out by a great meteorite impact on the Earth 66 million years ago. But their origins have been less understood. In a new study, scientists show that the key expansion of dinosaurs was also triggered by a crisis — a mass extinction that happened 232 million years ago.
Paleontology News — ScienceDaily

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