Watch The Valley of the T-Rex (2001) : Full Movie Online Free Valley of the T. rex is a Discovery Channel documentary, featuring paleontologist Jack Horner, that aired on September 10, 2001. The program shows Horner with his digging team as they travel to Hell Creek Formation in search for dinosaur fossils, while also following Horner as he presents his view of the theropod dinosaur Tyrannosaurus rex as a scavenger rather than a predator, as it is often portrayed in popular culture. Paleontologist Jack Horner finds the skeletons of five T-Rex dinosaurs in the badlands of Montana in a single summer, yielding fresh clues about T-Rex behavior.