Image via Wikipedia by Karyn Buxman We come into this world laughing.  Any parent can tell you about the joy of babies laughing, for no known reason save the joy of it. As children age, they keep on laughing: on average, kids laugh 300 times a day.  Yet the older we get, the less we laugh. The average adult laughs 15 times a day -- a 95% reduction from the carefree days of childhood. Where have the giggles gone? Did the chuckles canter away, leaving humor high and dry? Have our high-str...