Swing and Doll, two chimpanzees who were rescued from a research lab, still remember the woman who saved them. Their reunion, 20 years later, shows how strong the bonds are between primates and humans.
13. 98% Human DNA
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Swing and Doll are two chimpanzees who lived in cages because they were subject to animal testing. Since chimps have 98% of the DNA of human beings, they are highly sought after as research subjects. However, as people learn more about the similarities between humans and chimpanzees, the ethics of animal testing appear morally wrong.