Dinosaurs' extraordinary features, such as spikes, sails, horns, and crests, were developed during the Cretaceous period, despite seeming unnecessary. The documentary examines these peculiar traits and explores the theories behind their existence.
Bizarre Dinosaurs
Dinosaurs developed remarkable yet seemingly useless traits such as spikes, sails, horns, crests, and the diminutive arms of tyrannosaurs as they grew into massive Cretaceous creatures.
