Happy Birthday Facebook! Ten years old!

Feb. 4, 2004 The Facebook was launched at Harvard University Mark Zuckerberg dropped out soon after and moved the operation to Silicon Valley. This is Zuckerberg and co founder Dustin Moskovitz in Palo Alto, 2004.

November 2005 Zuckerberg showed this as his business card to a Fortune reporter.

Sept. 6, 2006 Facebook added a News Feed that shows a stream of posts from a person's entire network of friends. A privacy debacle ensued, and Zuckerberg apologized with a blog post titled Calm down. Breathe. We hear you. He didn't retreat from his plans, and News Feed became the lifeblood of the service.

March 4, 2008 Facebook announced that it has hired Sheryl Sandberg from Google to be its chief operating officer. Her mission build a more mature business and add credibility to the company.

June 2, 2010 Zuckerberg was grilled about privacy onstage at the D8 tech conference. He sweats so profusely that he had to take off his hoodie on the inside of which is a large illuminati like symbol meant to depict Facebook's strategy for connecting the world. Oh my God, you're in a cult! interviewer Kara Swisher jokes.

July 2011 Facebook moved into its new home, the former campus of Sun Microsystems.

April 2012 Facebook snapped up Instagram, a five employee startup and maker of the hugely popular photo sharing app. The acquisition set the stage for a strategic shift away from Zuckerberg's long standing one social network fits all approach.

May 2012 December 2013 Mobile transition. Facebook's IPO revealed a serious flaw The company wasn't earning any money on smartphone apps. Despite a late start, Facebook improved its mobile apps and develops a significant online ad business over the ensuing year. Mobile is now Facebook's biggest source of revenue.