How to Flip a Coin (probability)

This week's episode is on the probability of a coin toss. This study was done by Harvard professor L. Mahadevan and physics graduate student Ee Hou Yong. Here is the link to the article and there is a diagram on the math and geometry of Bertrand's paradox. https://physicstoday.scitation.org/doi/10.1063/PT.3.1178