Archaeopteryx: quick facts

Identified by many as the first bird, Archaeopteryx resembles acoelurosaur but was covered in feathers. (Its remains were found in finegrained stone which still bore the clear impression of its feathe

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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.