Mark Zuckerberg, one of the richest college dropouts, turns 30 years old Wednesday, hitting a milestone in a not-so-spotless timeline.
The Facebook CEO dropped out of Harvard as a sophomore and started up the social network exclusively for college students in 2004.
And just a few years after the site was opened up to the general public in 2006, the 24-year-old CEO landed on the Forbes 400 list of the richest people in America. He ranked No. 321 in 2008, with an estimated net worth of $1.5 billion. At that time, Facebook had about 100 million active users.