Brachiosaurus

Brachiosaurus was a giant sauropod dinosaur that roamed North America during the Late Jurassic period, roughly 155 to 145 million years ago, and is notable as one of the earliest dinosaurs formally described by paleontologists when American scientist Elmer S. Riggs first identified it in 1903 from Colorado fossils. The dinosaur's name refers to its distinctively long arms relative to its body size, and it ranks among the largest known land animals from the fossil record.

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