Written by Michelle Kretzer Zoos have long tried to hide the cruelty of captivity behind a mask of “conservation education.” But a new study shows that learning is usually not the outcome. Sociologists in the United Kingdom gathered data from children between the ages of 7 and 15, both before and after they visited the London …

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Thirty-five years ago, a female chimpanzee—identified only as “4X0139″—was intentionally infected with the hepatitis B virus by experimenters. She was then infected with HIV, hepatitis C, and other illnesses and has been imprisoned in a laboratory for use in traumatic experiments in the decades since. Recently, in an experiment at the notoriousTexas Biomedical Research Institute, she was injected …

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