"There's no machine known that is more efficient than a human on a bicycle. Bowl of oatmeal, thirty miles. You can't come close to that."
—Not surprising that Bill Nye, the Science Guy, has known about the efficiency of the bicycle for a long time.
"The bicycle is the most efficient machine ever created. Converting calories into gas, a bicycle gets the equivalent of three thousand miles per gallon."
— Bill Strickland
(Chart: Scientific American)
A more up-to-date chart, created by Alexandre Bizeul, with data from the International Energy Agency:
"The bicycle is the most efficient machine ever created...a triangle-framed bike can easily carry 10x its own weight—capacity no automobile, airplane or bridge can match.”
—also Bill Strickland