Horses have emotional memory
Horses can remember your facial expressions - life science news

Experiments have revealed that horses understand human facial expressions and can even memorise them. In the morning, the horses were shown pictures of people looking either angry or happy. A few hours later the horses met the people from the photos in person, but this time the human participants had a neutral expression on their faces. It turned out that the horses looked at people with angry faces on the photo with their left eye, consistent with the idea that animals use their right hemisphere for threat processing. Horses could therefore assess whether a person might represents danger or not by assessing human emotions.

Read the full story: University of Sussex
Scientific publication: Current Biology