Mystery of the miniature T-Rex

Everyone's heard of T-Rexes, the twenty-foot-tall monsters that roamed the Earth back in the Late Cretaceous Period. But you may not have heard of their miniature cousin. It's a six foot tall dinosaur called Suskityrannus hazelae, and it gives us a clue about when and how T-Rexes got as big as they did. Sterling Nesbitt is the paleontologist who found the second and most complete fossil of this new dinosaur, but it took him twenty years to put this paper together. Phil Sansom asked him how.