The testing began shortly after Bobby’s first birthday. By the time he was 19 he had been anesthetized more than 250 times and undergone innumerable biopsies in the name of science. Much of the time he lived alone in a cramped, barren cage. Bobby grew depressed and emaciated and began biting his own arm, leaving permanent scars.

Bobby is a chimpanzee. Born in captivity to parents who were also lab chimps, he grew up at the Coulston Foundation, a biomedical research facility in Alamogordo, N.M., that was cited for repeated violations of the Animal Welfare Act before it was shuttered in 2002. He is one of the lucky ones. Today he lives in a sanctuary called Save the Chimps in Fort Pierce, Fla., where he can socialize and roam freely. Last year the National Institutes of Health announced plans to put some 180 ex-Coulston chimps currently housed at the Alamogordo Primate Facility back in service, to rejoin the roughly 800 other chimps that serve as subjects for studies of human diseases, therapies and vaccines in the U.S., which is the only country apart from Gabon to maintain chimps for this purpose.