Tears: More Than Meets the Eye

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Scientists have long wondered why humans are the only species that cries for emotional reasons. It turns out that our tears may convey much more than just sadness, grief or anger. In a new study, scientists have proved that more complicated chemical reactions may be at play, like subduing male arousal.

Pam Belluck, science writer for our partner The New York Times, joins us to discuss the hidden chemistry behind our tears, detailed in a new story on the subject.