On Facebook's Birthday: Test Your Facebook Knowledge! [QUIZ]

On this day in 2004, Mark Zuckerberg introduced his fellow Harvard students to the future of social networking.Soon his nascent project, Facebook, would become a billion-dollar business and the world's most popular social media site.

Yes, February 4 is Facebook's birthday, so we're going to have a bit of fun. Why not celebrate with us by testing your Facebook knowledge in our quiz?