Arizona State University and University of Utah professor Polly Wiessner addresses intergroup ties between humans, chimpanzees and bonobos and explores some of the possible evolutionary developments that contributed to the human disposition to form mutually supportive external bonds, and then discusses the impact of social ties on coalitionary action; UC San Diego professor Rafael Nuñez discusses the comparative analysis of “quantity” and “number”, and the implications it has for debates about the origins of other human special capacities such as geometry, music, and art; and UC San Diego School of Medicine professor Nissi Varki discusses the incidence of carcinomas, including the rarity of occurrence of common human carcinomas in captive chimpanzees. Series: "CARTA - Center for Academic Research and Training in Anthropogeny" [Humanities] [Science] [Show ID: 37529]