Why Do We Cry?

Ever wonder why your face leaks when you’re sad or emotional? Find out why we cry! 

Further Reading —

Tears as signals:
http://www.epjournal.net/wp-content/uploads/ep07363370.pdf
http://www.ncbi.nlm.nih.gov/pubmed/22947977
http://epjournal.wpengine.com/wp-content/uploads/EP075256.pdf

Tears from helplessless:
http://www.sciencedirect.com/science/article/pii/S0732118X03000291

Happy Tears:
http://www.theglobeandmail.com/life/health-and-fitness/health/conditions/why-do-we-cry-when-were-happy/article599605/

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