This article available online at:
http://www.theatlantic.com/technology/archive/2012/12/the-new-math-of-some-temporary-things-ranked-by-how-long-they-last/265827/
This article available online at:
http://www.theatlantic.com/technology/archive/2012/12/the-new-math-of-some-temporary-things-ranked-by-how-long-they-last/265827/