In stark contrast to the previous posting, the Freakonomics blog looks at statistical evidence that shows how much more likely you are to be killed as a commuting cyclist, than a motorist.

Bottom Line: Biking may be healthier and less harmful to the environment, but comparatively it still is pretty dangerous.

Make sure you watch the odd 1963 Bike Safety film linked in the posting, which features a scary looking group of bike-riding monkeys.