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Join Joe Hanson as he explores curiosity and illuminates the science behind… well, everything.
Why Do We Cry?
Season 6 Episode 20 | 4m 20s | CC
Why do we cry? It’s weird. Humans leak water out of their faces when they get sad. Are we the only animals that do this? What does it mean? What is it for? Here’s the science of human tears!
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