Tooth of Columbian Mammoth. This molar tooth, useful for grinding the grass that was a diet mainstay, was discovered in Harvey County in 1966 during the construction of Interstate Highway I-135. Photo credit: Ronald Dietzel. 2/21/2017
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Tooth of Columbian Mammoth. This molar tooth, useful for grinding the grass that was a diet mainstay, was discovered in Harvey County in 1966 during the construction of Interstate Highway I-135. Photo credit: Ronald Dietzel. 2/21/2017