Why do we cry? The three types of tears (TED-Ed video)

Whether we cry during a sad movie, while chopping onions, or completely involuntarily, our eyes are constantly producing tears. Alex Gendler tracks a particularly watery day in the life of Iris (the iris) as she cycles through basal, reflex and emotional tears.



Read more here: http://ed.ted.com/lessons/why-do-we-cry-the-three-types-of-tears-alex-gendler
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Ditulis oleh: Unknown - Saturday, October 25, 2014

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