Photographer: Calvin J. Hamilton Copyright: © 2010 Calvin J. Hamilton Date: 2005/03/22 Date Added: 2010/03/25 Location: Montana

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• Maiasaura peeblesorum

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Caption

This cast of a Maiasaura peeblesorum dates to the Late Cretaceous period, 80-65 million years ago. It was one of 15 skeletons collected by Princeton University in 1978. This speciman was a juvenile and the skull is one-tenth as long as an adult.