Lots of people talk to animals, but Next of Kin author Roger Fouts was one of the first to figure out how to get them to talk back. In 1967, the primate expert was part of the team that originally taught American Sign Language to chimpanzees. In this lecture, “Conversing With Chimps,” he discusses his work with a chimpanzee called Washoe and her son Louis, which has enabled him to study how ASL-trained chimps use language both with humans and among themselves. Fouts, a psychology professor at Central Washington University, will sign copies of his book after this talk. At 6 p.m. at the Ripley Center’s Room 3037, 1100 Jefferson Dr. SW. $13. (202) 357-3030. (MJ)