Muhammad Saleem is a social media consultant and a top-ranked community member on multiple social news sites. Follow him on Twitter for more social media insights.

Facebook was launched on February 4, 2004 and has come a long way from a Harvard-only networking site in the intervening years. In fact, Facebook has undoubtedly become the world's largest social network, with over 400 million users worldwide and more than 900 employees. Let's take a closer look at what kinds of numbers and user activity this growth translates to.

The following infographic explores Facebook's growth over the past 6 years.

Click for the full-size graphic.