If you’ve ever “stumbled”, as in used the popular and addictive website Stumbleupon, the infographic below if for you. It’s a great way to broaden one’s exposure to related ideas and make serendipitous discoveries.

Interestingly, the typical attention span of a Stumbleupon user seems to be much longer than that of the average Facebook follower.

[div class=attrib]Infographic courtesy of Column Five Media.[end-div]