All Yesterdays: Unique and Speculative Views of Dinosaurs and Other Prehistoric Animals by John Conway & C.M. Kosemen & Darren Naish

All Yesterdays: Unique and Speculative Views of Dinosaurs and Other Prehistoric Animals by John Conway & C.M. Kosemen & Darren Naish

Author:John Conway & C.M. Kosemen & Darren Naish [Conway, John]
Language: eng
Format: epub
Tags: dinosaurs, dinosaur art, palaeoart, paleoart, palaeontology, paleontology, prehistoric animals
ISBN: 9781291176919
Publisher: Lulu.com
Published: 2012-11-05T16:00:00+00:00


Ouranosaurus was a large iguanodontian ornithopod that inhabited northern Africa during Early Cretaceous times. Several other distantly related dinosaurs from the same location also have elongated vertebral spines, including the enormous theropod Spinosaurus and the sauropod Rebbachisaurus. So perhaps, instead of just Ouranosaurus, the region was inhabited by an entire cast of unusual, hump-backed dinosaurs in real life. The reason for such unusually synchronized convergent evolution, and indeed the very nature of these spines in life, remains unknown. Perhaps climactic factors or sexual selection could have played a role. Display is certainly a likely purpose-and certainly fits with the general idea that dinosaurs were flamboyant, social animals.



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