Researchers briefly anesthetized chimpanzees and painted an odorless red dye on their heads. when they awoke and looked in the mirror, the chimps immediately reached to touch their brows and ears where the dye was. these findings suggest that chimps

were able to develop a sense of self-recognition comparable to two or three-year-old humans

Explanation:

The intelligence of chimpanzees is well known. They can learn sign language with acceptable vocabulary, have symbolic ability, use tools and have even proven themselves superior to us in some mathematical memory skills. Primatologists say that his mental capacity is similar to that of a three-year-old boy. In a famous experiment called the "floating peanut", carried out by scientists from the Max Plank Institute in Germany, children of that age and monkeys could get a prize if they were able to rescue a nut put in a test tube, for which they were He handed a glass of water. Animals and young reached similar successes, but the former were dedicated to improvise, while the little ones were able to imitate those who were most successful.