Piecing Together the Largest Carnivore Ever - Paul Sereno

Following the discovery of a complete skeleton for the 50-foot long spinosaurus, the largest meat-eater to ever walk the earth. Paul Sereno puts what they know about the dinosaur into context. Sereno helped discover and reassemble the large reptile, and explains why the dinosaur had the 7-foot tall sail on its back. He explains that the spinosaurus lived 100 million years ago, and while it's larger than the famed T. rex, they never would have encountered each other. Sereno also explains that spinosaurus dominated the landscape at a time when there were four other predators that nearly equals it in size.