Slate answers a question I’ve long wondered: After how long will idling a car become less efficient than turning it off and then back on?

It turns out that modern cars start very cheaply, so if you’re going to idle for 10 seconds, it can be effective to turn the engine off. Details and caveats in the article, of course.

Put these beliefs in order of the percentage of Americans who have them according to recent polls:

- Bush knew about 9/11 before it happened (polling in 2007)
- Obama is a Muslim (polling in 2008)
- Saddam had WMD (polling in 2007)
- They have been in the presence of a ghost (polling in 2007)
- The Sun revolves around the Earth (polling in 1999)

The highest number in the list is 30%, the lowest is 10%. Answer will be posted once there are some guesses..

I posed this to a couple of coworkers today, and they were able to get all but one right, which was impressive.

Good luck!