I love Jack Horner. He and I go way back. Well, not really. I read an article once that was an interview with him in which he discussed his Halloween preparation (which, apparently, are quite elaborate) and his work on the recently producer Jurassic Park movie in which he was consulted regarding the look and appearance of the dinosaurs.
In this lecture: he discusses a realization (“Where are the little, as in juvenile, dinosaurs?”), a theory (that dinosaurs change over time much like their avian posterity) and a discovery (many of the ‘different’ dinosaurs are actually the same dinosaurs while they are growing up).
Jack Horner: Shape-shifting dinosaurs (TED)