Inside Mamenchisaurus

Part of the The World's Largest Dinosaurs exhibition.

No one has ever seen inside a sauropod. After all, flesh doesn't fossilize. But today's experts are making science-based reconstructions of the biological systems that allowed members of this group to become the largest animals that ever walked.

By understanding how these ancient giants chewed--or didn't chew!--how their digestion worked, how they breathed, scientists are coming closer to unraveling the mystery of size.