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[WARNING] This list contains descriptions and images of human experimentation which may cause offense to some readers.] Human experimentation and research ethics evolved over time. On occasion, the subjects of human experimentation have been prisoners, slaves, or even family members. In some notable cases, doctors have performed experiments on themselves when they have been unwilling to risk the lives of others. This is known as self-experimentation. This is a list of the 10 most evil and unethical experiments carried out on humans.