March 21, 2012 marks social media network Twitter’s sixth birthday. It’s hard to believe that it was six years ago that co-founder Jack Dorsey tweeted the first ever tweet. Today, Twitter boasts over 500 million registered users and is undeniably the leading micro-blogging system on the web. The site is ranked 9th overall worldwide and 8th in the U.S. by Alexia.com.
The social media network came from humble beginnings in what started as an offhand project by board members of the podcasting company Odeo. In the first years of Twitter, the open communication service experienced a rocky start with stability problems and frequent down times. Those issues are a thing of the past, as Twitter’s growth has since generated massive spikes in usage during unforgettable moments like the FIFA World Cup, the Hudson River plane crash, Michael Jackson’s death, and the Japan earthquake.