Location : Western U.S.

Sauroposeidon is possibly the tallest dinosaur ever! Reaching heights as high as a six-story building, this huge plant eater was related to Brachiosaurus  What is interesting is that it lived at a time when there were very few giant sauropods left in North America - most had become extinct by the middle of the Cretaceous period.

The discovery of this huge sauropod has been a great help to scientists, as not much is known about dinosaurs from this period. It is also a bit perplexing, however, as most of the giant North American sauropods had vanished by this time. Their cousins were thriving in South America, but for some reason they had, except for Sauroposeidon, gone extinct in North America and would not be seen again for tens of millions of years until the titanosaurs migrated north.

Very little material of this creature has been found; the genus is based on some cervical vertebrae and rib material.