(This article previously appeared on Grandparents.com.)
There are three kinds of tears: reflexive (clears out irritants), continuous (keeps eyes lubricated) and emotional (responding to joy and sadness). Did you know that humans are the only animals who can do the third one? This fact has led many scientists to ask why. If evolutionary changes are based on improving survival, what about emotional crying is beneficial? The answer is: quite a bit.
Why Crying Is Good for You
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