AdvertisementMammoth On The Move: Rare, Nearly-Intact Skeleton Heads To DallasSeptember 20, 2014Lauren SilvermanfacebookEmailMammuthus 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)
