There is always hot controversy in the realm of the dinosaurs but one thing is agreed upon, when it comes to size in dinosaurs big is better and the biggest of the lot was a Seismosaur. His name means ground shaker and this mock up of a Seismosaurs skeleton gives you a good indication why.

Conventional wisdom has him clocking in at 170 ft and making him the largest animal ever to have lived. What gave Seismosaurus his incredible length was a long whip-like tail. Now controversial new research by paleontologist Spencer Lucas of the New Mexico Museum of Natural History and Science has pruned nearly 70ft off the overall length by shortening the predicted length of the tail. He claims that researchers wanting to have a bigger one than everyone else placed the few caudal vertebrae (as the vertebrae in the tail are known amongst the white lab coat fraternity) that they had too far down the tail.

At 100 feet long it was still an impressive animal but not that much bigger than a Diplodocus, which you will all be familiar with as a the earth moving dinosaur that Fred Flinstone operates in the quarry where he works.

There is only one known fossil of Seismosaurus, which is incomplete and is housed at the New Mexico Museum of Natural History and Science in Albuquerque where it is on public display.

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Or visit the New Mexico Museum of Natural History and Science.