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 Duncan wrote about the death in his unpublished memoir: He heard Rin Tin Tin bark in a peculiar fashion so he went to see what was wrong.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 learn." In order to study the development of these learning sets, Harlow needed access to developing primates, so he established a breeding colony of rhesus macaques in 1932. Due to the nature of his study, Harlow needed regular access to infant primates and thus chose to rear them in a nursery setting, rather than with their protective mothers. This alternative rearing technique, also called maternal deprivation, is highly controversial to this day, and is used, in variants, as a model of early life adversity in primates. Research with and caring for infant rhesus monkeys further inspired Harlow, and ultimately led