Dr. Marvin Rowe, professor of chemistry, presented a paper titled "Four Archaeological Sites of Outstanding Universal Value in the United States" at the "Prehistory and the World Heritage Convention: Towards an Action Plan and the Related Thematic Studies" conference, held this week at the UNESCO headquarters in Paris. Eighteen experts from 12 countries were invited to participate in the categories of prehistory, human evolution and rock art. An archaeological site emphasized in Rowe's talk -- the Lower Pecos River site in southwest Texas that was occupied from about 11,500 years ago until the arrival of the Spanish in the mid-1500s -- was selected by both the prehistory and the rock art study groups for nomination as a future UNESCO World Heritage Site. Rowe was invited to participate in the next meeting of the UNESCO rock art study group to be held in February 2009 in South Africa.