A.J. Jacobs is a fascinating person. His life is one big experiment. Because he goes through seasons when he obsessively shapes his life around a certain issue or question. For example, he spent an entire year attempting to follow the rules of the Bible as literally as possible. Most of these laws came from the book of Leviticus.
He wrote a book about his year of living biblically but you can also check out his presentation at a TED conference: