Brachiosaurus Length: 75 - 85 Feet Lived during: Late Jurassic Found: Colorado, Tanzania Name Means: Arm Lizard The tallest dinosaur ever found, 70 ton Brachiosaurus could have looked over was once of a 4 story building.  It nostrils were on the top of its head, so it was once believed that such dinosaurs used them as underwater snorkels.  However, it's now thought that they probably couldn't have survived long underwater.  The water pressure would have keep them rom breathing properly. Lived at the same time as :  Allosaurus, Apatosaurus, Camptosaurus, Diplodocus, Ornitholestes, Stegosaurus

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