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The dinosaur that tells us more about North America
It appears that the fossilized fragment of a jaw bone from a sheep-sized dinosaur has a lot to tell us about the evolution of the species and the geography of North America, 30 millions years ago. Dr Nick Longrich from the University of Bath's Department of Biology and Biochemistry in southern England is a researcher who's studied the intriguing bone.
( Drawing of the sheep-sized dinosaur. Credit: Dr Nick Longrich )
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