In a spellbinding talk, paleontologist Jack Horner tells the story of how iconoclastic thinking revealed a shocking secret about some of our most beloved dinosaurs.

Renowned paleontologist Jack Horner has spent his career trying to reconstruct a dinosaur. He's found fossils with extraordinarily well-preserved blood vessels and soft tissues, but never intact DNA. So, in a new approach, he's taking living descendants of the dinosaur (chickens) and genetically engineering them to reactivate ancestral traits — ...