In this June 2, 2012 frame grab provided by WOI-DT John carryies a mammoth bone on Saturday, June 2, 2012, that was found on his rural farm near Oskaloosa, Iowa. The find is rare because it appears to include much of the animal’s skeleton undisturbed. That allows scientists to gather pollen and other plant evidence at the dig site that could reveal details about Iowa’s environment more than 12,000 years ago. (AP Photo/WOI-DT) MANDATORY CREDIT