Nonhuman primates are a diverse group of mammalian species that are closely related to humans, including monkeys, apes, and prosimians. Research on nonhuman primates plays a crucial role in understanding various aspects of human biology, behavior, and cognition. These animals are often used as models in studies related to genetics, neurology, psychology, and social behavior, among others. Nonhuman primates are also important in biomedical research, including the development of vaccines and treatments for human diseases. However, research involving nonhuman primates is controversial due to ethical concerns and the potential for harm to these animals.