Horses facial expressions.
Quote:
Scientists at the University of Sussex have compiled a directory of facial expression in one of humanity’s oldest four-legged friends. Their Equine Facial Action Coding System (EquiFACS for short) has identified 17 discrete facial movements in horses that may indicate mood or intention or just bafflement.
This is at least three more than the facial expressions identified in chimpanzees. Dogs can get a message across with 16 different expressions. And human faces have 27 different ways of speaking silently, with the lips and eyes and the occasional wrinkled nose.
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