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(DENVER. CO. FEBRUARY 14, 2005) Denver Museum Of Nature and Science curator of archaeology Steven Holen show off mamoth and camel bones which have signs of human impact on Monday February 14, 2005 in Denver. The bones of the now-extinct animals were dis

(DENVER. CO. FEBRUARY 14, 2005)  Denver Museum Of Nature and Science curator of archaeology Steven Holen show off mamoth and camel  bones which have signs of human impact on Monday February 14, 2005 in Denver. The bones of the now-extinct animals were dis