Research suggests that crying is not a sign of weakness, but one of the most sophisticated social technologies in the natural world.

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Some people cry frequently, but not fully. They’re good at crying but never seem to heal from what’s hurting them. Crying is supposed to be good for you. Tears contain toxins, after all. And feel-good ...

Among the myriad of actions performed exclusively by humans, crying appears to be the most enigmatic. While no other animals are known to cry, humans shed emotional tears from birth throughout life.