Tonight, the National Geographic channel will be airing Dinosaurs Decoded, which premiered on Sunday. The program explores the issue of how dinosaur ontogeny - how they changed as they matured from infancy to adulthood - raises questions about what species are "real" and which are simply juveniles of previously known species. For instance, is Nanotyrannus actually a young T. rex? Paleontologists Jack Horner and Mark Goodwin put forth the theory that perhaps as many as a third of all known dinosaur species are actually juvenile forms of other species.
I haven't seen this yet as I don't have cable or satellite service at home. Maybe Nat Geo will be kind enough to put it online one day...
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