We all know pi, right? It's one of the most famous 'irrational numbers' in history, and mathematicians are still trying to figure it out in the modern day. While this may seem arcane to some of us non-mathheads, in today's episode, Ben, Noel and Max learn these numbers were3 once such a big deal that legends say folks got murdered for discovering them. Tune in to learn the harrowing tale of Hippasus, a Pythagorean cultist who discovered irrational numbers -- and, in doing so, pissed off the Gods so much that they drowned him.

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As the Fox sisters became global superstars for their purported ability to speak with the dead, the Spiritualism movement became both a social phenomena and a booming business. Yet along with the rise of true believers and performing psychics, an army of skeptics and investigators rose as well... and the questions they asked eventually brought the entirety of the movement down. Join Ben, Noel, Max and returning special guest Jonathan Strickland (aka The Quizster) for the second part of this special two-part episode.

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Language is beautiful and, in many cases, continually evolving. As a result, we end up with hundreds of strange idioms and figures of speech that we use on a daily basis, with little to no understanding of what they originally meant. Join the guys with special guests Frank Mulherin and Rowan Newbie, the creator of the Pitches podcast, as they explore the bizarre origins of your favorite turns of phrase in this week's Classic episode.

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