60. All I Wanna Do Is… Bicycle! Part I

Here in Portland, we love our bicycles! But what is it about these seemingly ordinary machines that makes us so energetically efficient?  Join Kira & Keera (and Keera’s mom!) to learn how the pedals, tires, and gears of a bike work together to propel you 3x as fast as walking, without you having to put in any more effort!

It’s not efficient, but it sure is fancy!