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Date:11/22/2014 8:38:48 AM
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Hi Pearl and Silver
Okay, the stegosaurus was too big to get in one pic, so here are 2 of him, front and back. Keeping in mind that dinos and birds are physiologically the same animal, what do you think the plates on his back are for? I know, there are old hypotheses about heating and cooling by raising and lowering the plates, but that's pretty much been discarded by modern paleontologists. Then there's the hypothesis that the plates were raised to make him look bigger and scare away potential predators. That's pretty much disproven, too, given the fragility of the plates. So here are the 2 latest: the plates on each stegosaur that has been found vary a little, so they could have been used for recognition of an individual in a herd--look, there's Stu, Sally, Steven, Susie, etc; the other is that, like birds, it's a tool of sexual display, much like male songbird colors, peacocks' tails (peahens don't have them in those terrific colors and patterns), you get the idea. Mom likes that last hypothesis best. You may mention that both sexes have the plates, to which mom will respond that male mammals have body parts they don't use either! Think about it. Anyway, even though we did not evolve from these guys, they are interesting. You might have noticed the painting of the steggies in the background. This is the largest mural ever in any dino exhibit. It stretches over 3 walls in DITT. More to come tomorrow. As always, thanks for your vote, and hope you are having a great day! Hugs, Gizmo
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