Rin Tin Tin of the movies. Rin Tin Tin and Nanette produced at least 48 puppies; Duncan kept two of them, selling the rest or giving them as gifts. Greta Garbo, W.K. Kellogg, and Jean Harlow each owned one of Rin Tin Tin's descendants. On August 10, 1932, Rin Tin Tin died at Duncan's home on Club View Drive in Los Angeles. Duncan wrote about the death in his unpublished memoir: He heard Rin Tin Tin bark in a peculiar fashion so he went to see what was wrong. He found the dog lying on the ground, moments away from death. Newspapers across
Harry Harlow Arizona until Harlow's death in 1981. Harlow came to the University of Wisconsin–Madison in 1930 after obtaining his doctorate under the guidance of several distinguished researchers, including Calvin Stone and Lewis Terman, at Stanford University. He began his career with nonhuman primate research. He worked with the primates at Henry Vilas Zoo, where he developed the Wisconsin General Testing Apparatus (WGTA) to study learning, cognition, and memory. It was through these studies that Harlow discovered that the monkeys he worked with were developing strategies for his tests. What would later become known as learning sets, Harlow described as "learning to