Today's 400-plus canine breeds display a vast variety of skull shapes, and scientists who recently compiled data on the history, biology and genetics of those variations hope the information will help identify the causes of some human craniofacial anomalies. "Dogs can serve as a model for skull growth and shape determination, because the genetic conservation between dogs and humans makes it highly likely that craniofacial development is regulated similarly between both species," said researcher Jeffrey Schoenebeck.

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