Are human beings the only animals that cry?
Tears are an important protection and lubricant for the eye. They can flush out irritants and keep the eye wet to enhance vision. The eye’s lacrimal system evolved to keep the eye surface moist. In aquatic animals, the eye is constantly bathed in water, but land animals are surrounded by air, so their eyes needed a built-in watering system. While most vertebrates are physically capable of producing tears, many scientists say that humans are the only animals that cry emotional tears. Different sources suggest that chimpanzees, elephants, dogs, and bears can shed tears. But we couldn’t find any scientific studies of animal’s emotional tears. As Tom Lutz author of Crying: The Natural and Cultural History of
