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Have you ever wondered why humans cry? Most mammals produce tears to clean (A9) ... eyes, but humans are unique — perhaps (A10) ... the exception (A11) ... gorillas and elephants that produce tears in response (A12) ... emotional stimuli. We might feel like crying when we hear (A13) ...sad news, or even cry (A14) ... happiness. Scientists are unsure (A15) ... any benefits of crying. Though some people say that (A16) ... good cry may help them get over difficult emotional situations.
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