Daniel Tammet [1] is a mathematical savant, able to make amazing calculations in his head. He can even calculate answers to over a hundred decimal places. He also speaks nine different languages and says he can learn a new one in just under a week. His story is absolutely fascinating. The video is a full documentary (48 minutes) but I promise is worth watching all the way through. If you don't want to watch the entire thing, at least watch the first eight minutes...

Click here [2] to watch the video via Google.

(Honestly...it is truly astounding.)