Squaring The Strange

Ben, Celestia, and Pascual help define what makes a crank a crank, and we look into the history of this concept. Then we bring a couple of examples we think illustrate textbook cranks and why they aren't just laughable, they can do some real harm. From selling spiritual self-help books and snake oil to trying to legislate a wrong value for Pi, cranks have a long and storied history in America.