People will "dress up" themselves when they look in the mirror. Will animals? A new Italian study shows that horses can recognize themselves in the mirror and "stink".

    The researchers found that the horses initially viewed the image in the mirror as similar, some wanting to play with each other, some showing aggression or fear. After looking at the back of the mirror, 11 horses found that the image in the mirror was themselves by shaking their heads and observing the image in the mirror or touching their tongue. According to the researchers, this indicates that the harness has mirror self cognition at the group level.

    The researchers also applied "X" marks on both sides of the faces of the 11 horses with transparent and color gels. As a result, they try to remove the "X" mark, and it takes longer to mark it in color. The researchers believe that this shows that the horse is aware that his image in the mirror is "damaged.".

    Being able to recognize oneself in the mirror is called "mirror self cognition", which is one of the signs that animals have a high level of intelligence. Researchers at the University of Pisa in Italy took 14 horses to test in the mirror and recorded their reactions with cameras.

    The researchers say their findings suggest that horses, like primates, may be one of the most self-conscious creatures on earth.