Aristotle thought that laughter is what separates us from the beasts, and that a baby does not have a SOUL, until the moment it laughs for the first time. Historian Barry Sanders, author of Sudden Glory, says that according to Aristotle, this moment of "human ensouling" is supposed to ...
This hour of Radiolab teases out stories of laughter--from a baby’s crib, to a rat’s cage, to a remote village in Tanzania that was struck by a laughing epidemic 45 years ago.