Emotional tears are a uniquely human behavior. Research suggests they evolved not for eye health but as a powerful social ...
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Are Humans The Only Animal Species That Cries?
Why do we cry? Faced with overwhelming joy or grief, our eyes well up and tears stream down our cheeks. Crying is one of the most defining human experiences one can have. And yet, it's an evolutionary ...
It first happened on an airplane. Returning home from a long five days in Washington, DC, I allowed myself to stop working and watch the movie Million Dollar Baby. I hadn't seen it and wondered how a ...
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