In 6 years, Twitter becomes major social, political player

A lot can change in six years. Just ask the folks at Twitter.

The microblogging site celebrates its sixth birthday, if you will, this week. The first tweet was sent March 21, 2006. A lot has changed since then.

Twitter now has more than 140 million active users and they're posting more than 340 million tweets a day, according to the microblogging site. That's more than 1 billion tweets sent every three days.

"Six years may not be very long in human terms, but it's been quite an enormous span for the thing we know and love as Twitter," a blog post on the site said Wednesday. "When @jack [Jack Dorsey, executive director of Twitter] first sketched out his notion in March 2006, no one could have predicted the trajectory of this new communication tool." Read more...