We know he’s worth a whole lot of money ($17.5 billion to be exact). We know he is the father of Facebook, and refuses to sell it because he wants to keep raising it. We know he went to Harvard, but never finished. We know there is a set of twins who wish they had never met him. And, we know that today, May 14th, is his 28th birthday. But, there has to be more to know about Mark Zuckerberg.