Emotional tears are a uniquely human behavior. Research suggests they evolved not for eye health but as a powerful social ...

Add Yahoo as a preferred source to see more of our stories on Google. Close up of a person using eye drops in their eye which is very pink and likely conjunctivitis. Scientists have created the first ...

Many people believe that if they cannot cry easily, it means they are emotionally numb or disconnected. But that is not always true. Sometimes, the reason is purely medical. One common and often ...

The new model mimics the structure and function of the human conjunctiva in a lab dish, even producing its own tears. When you purchase through links on our site, we may earn an affiliate commission.