Rating is available when the video has been rented.
This feature is not available right now. Please try again later.
Published on Nov 1, 2012
Human beings are the only species that cries for emotional reasons. Neuroscientist Michael Trimble investigates where this fits into the story of human evolution, and how it connects with the development of music and other arts. Why Humans Like to Cry: http://oxford.ly/Y6p4o6