Jim Stone, executive director of walking-advocacy group WalkSanDiego, says he has found Google can say a mile will take anywhere from 15 to 30 minutes, depending on the details of the route.

WSJ: Timing an Urban Stroll Isn't a Walk in the Park

Count Jim Stone, 38, of Clarksville, Tenn.

CNN: Still On A Roll?

The show, with Mr Stone's words and ideas and Jim Henson's puppets, was a brilliant success from the start.

ECONOMIST: Jon Stone