It is curious that with the advent of the automobile and the airplane, the bicycle is still with us. Perhaps people like the world they can see from a bike, or the air they breathe when they're out on a bike. Or they like the bicycle's simplicity and the precision with which it is made. Or because they like the feeling of being able to hurtle through air one minute, and saunter through a park the next, without leaving behind clouds of choking exhaust, without leaving behind so much as a footstep.