Discover the relationship between dinosaurs and birds, and find out that rhinoceroses once lived in Nebraska. Bill also tracks down dinosaur footprints with paleontologist Grace Irby and travels to the La Brea Tar Pits to see what's underneath all that tar. The DVD has extra features: fully indexed "chapters" correlated to national science standards, interactive glossaries and quizzes, bonus footage of never-before-seen segments, interviews and demos, Spanish translation, and on-disk implementation guide. .