Using the fragmentary fossil record and other scientific data, paleontologists have succeeded quite brilliantly in reconstructing the dinosaurs’ long-ago world, providing insights into their appearance, behavior, diet, environment, and ultimate fate—all of which have significant implications for the ongoing evolution of humankind. Sifting through the Horizon archive, this program examines the extraordinary finds and chance discoveries, technological innovations, and revolutionary thinking that have kept paleontology in a constant state of evolution. A BBC Production. (52 minutes)