Ultrasauros: quick facts

Discovered in Colorado by dinosaur digger Jim Jensenof Brigham Young University, this extremely large dinosaur was formerly known as Ultrasaurus. The name was changed as it hadpreviously been claimed

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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.