“Gregory Louis Possehl (July 21, 1941 – October 8, 2011) was a Professor Emeritus of Anthropology at the University of Pennsylvania and curator of the Asian Collections at the University of Pennsylvania Museum of Archaeology and Anthropology. He has been involved in excavations of the Indus Valley Civilization in India and Pakistan since 1964, and is an author of many books and articles on the Indus Civilization and related topics.“ —Wikipedia