WASHINGTON (Reuters) - By about age 2, people can recognize their own reflections in a mirror. Great apes including chimpanzees, orangutans, bonobos and gorillas also have exhibited this key indicator of intelligence. But monkeys? Not so much.
Monkeys have consistently failed to display self-recognition in mirror experiments. But new research by Chinese scientists that underscores the simian capacity for learning showed that rhesus monkeys can be taught to recognize that the face staring back at them from the mirror is their own.