An undated handout photo provided by Bonhams shows a Tyrannosaurus rex tooth discovered in the late summer of 2011 in Garfield County, Mont., which is one of the largest ever found.†The piece ... more 
An undated handout photo provided by Bonhams shows a Tyrannosaurus rex tooth discovered in the late summer of 2011 in Garfield County, Mont., which is one of the largest ever found.†The piece brought a new world auction record for the most expensive pre-historic tooth ever sold at public auction. The tooth sold for $56,250 during the December 11, 2011 Natural History auction at Bonhams in Los Angeles. (AP Photo/Cate Hurst, Bonhams) less 
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Wed, Apr 4, 2012 12:44 PM EDT