Seismosaurus: quick facts

Found in New Mexico, Seismosaurus may prove to be thelongest dinosaur known. While Argentinasaurus was probablytaller and heavier, Seismosaurus was as long as half a footballfield. In the absence of g

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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.