Researchers describe a link between genetic relatedness and sophisticated tool use in primates in East and Central Africa, suggesting their culture is cumulative. Researchers describe a link between genetic relatedness and sophisticated tool use in primates in East and Central Africa, suggesting their culture is cumulative. Monkeys and Apes, Animal Behavior, Genetics and Heredity, Archaeology and Anthropology, Research, Animal Migration, Science (Journal), your-feed-science, Africa NYT > Science