Stephen Wolfram analyzes 20 years of his own keystroke activity

"One day I'm sure everyone will routinely collect all sorts of data about themselves," writes Stephen Wolfram (founder of the eponymous technology company). "But because I've been interested in data for a very long time, I started doing this long ago. I actually assumed lots of other people were doing it too, but apparently they were not. And so now I have what is probably one of the world's largest collections of personal data."

Above, a plot with a dot showing the time of each of the third of a million emails he's sent since 1989. In this mind-blowing post, Wolfram digs into all sorts of data from his digital output over the past two decades. (via demarko)