Emotional tears are a uniquely human behavior. Research suggests they evolved not for eye health but as a powerful social signal that strengthens bonds and elicits care.
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Why babies cry at birth yet take weeks to laugh — the science behind their first emotions
We have all seen this moment countless times: a baby enters the world and bursts into tears. It is so common that we rarely stop to wonder why it happens. Why do newborns cry instantly after birth?
Humans appear to be the only species clearly proven to shed tears specifically because of emotions. Elephants, primates, and dogs show behaviors and biological responses that come closest to human ...
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