Evel Knievel, the world-famous daredevil, is planning his greatest ever stunt. In 1974, he wants to leap over Snake River Canyon in Idaho. The chasm is almost a third of a mile wide, much bigger than any jump he's done before. To make it work, he'll need a custom-made rocket-powered "Skycycle," TV camera crews and - most importantly - a very positive attitude. 

For a list of sources, see the show notes at timharford.com.

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