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It's Okay To Be Smart: Season 2018

2018x21 The Only Animal That Weeps

  • 2018-07-17T19:00:00Z on YouTube
  • 7m
  • United States
  • Special Interest, Documentary
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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