Features some of the then-modern theories about dinosaurs and how they lived, from the appearance of early forms like Herrerasaurus, to the Tyrannosaurus and ceratopsians of the Late Cretaceous. Discusses the possibilities whether dinosaurs were active, warm-blooded animals, had parental care, were ancestors to birds, and what caused their extinction.

• Barbara Feldon
• Robert Bakker
• Jack Horner
• Paul Sereno
• James Farlow
• Martin Rudwick
• David Norman
• Michael Novacek