Eoraptor: quick facts

Discovered in Argentina in 1991 by a team led by PaulSereno of the University of Chicago, Eoraptor is the most primitivedinosaur known -- 228 million years old. This find, coupled withthe discoveries

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Reference background: Natural History Museum, London — Dinosaurs; Smithsonian National Museum of Natural History — Dinosaurs; American Museum of Natural History — Dinosaurs & Fossils. Figures are typical published ranges; taxonomy follows the source era and modern consensus is noted where it differs. See our sources & fact-check policy.