Mark Zuckerberg

Mark's Terrible, Horrible, No Good, Very Bad Day

When Mark Zuckerberg was 19 years old, he launched Facebook from his Harvard University dorm room. (Some cynics might say "stole" is a better word than "launched," but who wants to start that debate?) Since then, he's made Facebook one of the internet's most valuable brands. And as he's done it, his net worth has climbed as high as $81.6 billion, making him the world's third-wealthiest man behind Amazon founder Jeff Bezos and Microsoft co-founder Bill Gates.