SCOTT SIMON, HOST:
Our marathon man of trivia is A.J. Jacobs, who once read the entire Encyclopedia Britannica to learn more and get a book contract. Why didn't he just write 50 Shades of Knowledge? A.J. joins us now to talk about Olympic facts, some of which may actually be true.
A.J., thanks for being with us.
A.J. JACOBS: And thank you for having me.
SIMON: Let's start with the marathon, A.J. Apparently, one of your favorite athletes in history was Spiridon Louis, who was the winner of the first modern marathon back in 1896.