According to a column that I read written by Joël Carbonnel, "Nature has never been able to count above five."\n\nA researcher has discovered that when the limbs have more than five digits they become distorted into a bow-legged shape which seriously interferes with normal walking or running.\n\nhttp://www.positivehealth.com/permit/Articles/Regular/joel74.htm
Why do human have five fingers and five toes?