Support WBURMammoth On The Move: Rare, Nearly-Intact Skeleton Heads To DallasPlay04:17Download AudioLauren SilvermanSeptember 20, 2014 ShareMammuthus columbi, the Columbian mammoth, used to be common in America, but went extinct about 10,000 years ago. The specimen found south of Dallas is estimated to be 20,000 - 40,000 years old. (Perot Museum of Nature and Science)
