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Formerly known as Brontosaurus, the Apatosaurus was discovered in the late 1800s, but when it was mounted for display, a skull from a different dinosaur was used, causing confusion. The error was finally corrected in the 1970s. To date, there is only one non-crushed Apatosaurus skull in existence.

• Late Jurassic, 154-145 million years ago
• United States
• Herbivorous, Possibly Herd
• 70 feet long, 15 feet tall at shoulder