** FOR USE ** In this photo taken on Dec. 12, 2010, Houston Museum of Natural Science Visiting Curator of Paleontology Robert Bakker, Ph.D. points to a Dimetrodon neck vertebra during a Houston Museum... more 
** FOR USE ** In this photo taken on Dec. 12, 2010, Houston Museum of Natural Science Visiting Curator of Paleontology Robert Bakker, Ph.D. points to a Dimetrodon neck vertebra during a Houston Museum of Natural Science paleontologist team field expedition to excavate a nearly complete Dimetrodon fossil at the Craddock Ranch in Seymour, Texas. less 
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Associated Press | Photo By Houston Chronicle, James Nielsen
Thu, Dec 16, 2010 3:01 PM EST