Tour has been going well so far.  David had a very drunk dude serenade him last night.

This video is unrelated to that incident but still well worth your time if you like to see totally unexpected things happen.

+ why oil is so expensive

This is why oil is so valuable: one tank of gas from a typical S.U.V. has the energy equivalent of more than 60,000 man-hours of work-roughly 100 men working around the clock for nearly a month. That is the power that the American consumer can access for about $60 at the gasoline pump. If gasoline were a person, we would be paying 10 cents an hour for his labor. Easily accessible reserves are running dry, though, which means that the industry must develop increasingly ingenious-and costly-techniques for getting at the oil. Deepwater drilling, for example, now happens so far offshore that rigs can no longer be anchored to the seabed; they must be held in place by an array of propellers, each the size of a two-car garage. The cost of deepwater drilling is close to twice that in shallow water.

Read the rest at Constant Siege

+ Kahn Academy: Cutting the Middlemen out of Education

The most popular educator on YouTube does not have a Ph.D. He has never taught at a college or university. And he delivers all of his lectures from a bedroom closet.

This upstart is Salman Khan, a 33-year-old who quit his job as a financial analyst to spend more time making homemade lecture videos in his home studio. His unusual teaching materials started as a way to tutor his faraway cousins, but his lectures have grown into an online phenomenon—and a kind of protest against what he sees as a flawed educational system.

Read the full article HERE.