Is it true that only humans can cry tears?

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large extent, right. turtles shed tears clear sand eye when nesting , many seabirds use tear ducts rid of excess salt, if don't have specialized structures. however, believe elephants cry emotional tears , expect of primates too.

i know tears come out of other animals, heard aren't result of emotions, , humans can cry being sad or happy or other emotions. i'm curious whether true or not.


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