Brontosaurus is a genus of gigantic quadruped sauropod dinosaurs. Although the type species, B. excelsus, had long been considered a species of the closely related Apatosaurus, researchers proposed in
Lived: 157.3 million years ago - 145 million years ago (Kimmeridgian - Tithonian)
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Speed: 12 – 19 mph
Scientific name: Brontosaurus (Thunder lizard)
Family: †Diplodocidae
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