There are some surprising animals with moustaches. Some, like famous cats on the internet, just have a distinctive pattern on their fur. But others have hair that is much more similar to humans. Emperor Tamarins are the most obvious, with their very long moustaches. But what about horses?

Facial hair growth in humans could have an evolutionary advantage, in making the grower appear more dominant than his peers. In pandas, facial fur patterns appear to be used for social communication. Who knows how a moustache could help the social status of a panda?