As dinosaurs grew into the behemoths of the Cretaceous period they evolved many extraordinary but apparently useless features including spikes, sails horns, crests and the tiny "arms" of tyrannosaurs. The program reviews these unusual features and discusses theories of why they exist.
Trailer
Cast
JK
Jenny Kubo
Director
Jack Horner
Self - Curator of Paleontology
Paul Sereno
Self - Paleontologist
RB
Robert Bakker
Self - Curator of Paleontology
Phillip Manning
Self - Paleontologist
Peter Cullen
Self - Narrator US
RT
Roger Tilling
Self - Narrator UK
Lawrence Witmer
Self
KC
Kristi Curry Rogers
Self - Paleontologist
MN
Mark Norell
Self - Curator of Paleontology
Gregory Erickson
Self - Professor
EG
Eleanor Grant
Writer
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Comments
2 Comments
Uriah SeeNov 25, 2025
{Kushal💖 LuiteL}Nov 25, 2025