With nearly one thousand episodes out in the world over the years, Ben, Noel and Max realized they've never asked about the origin of the word "ridiculous." In this rollicking, cartoonishly meta episode, the gang learns the history of this specific word -- and why, since before the dawn of recorded history, humans have always been all about a good joke. (And, of course, terrible jokes as well.)

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What are your favorite children's books? In this Classic episode, Ben and the gang acknowledge Dr. Seuss is one of the most well-known writers on the planet. "Green Eggs and Ham", one of his most successful books, sold over 8 million copies by 2016 -- but would you believe he wrote it based entirely on a bet?

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As Axis powers swarm across Europe in the lead-up to D-Day, a small group of scientists refuse to leave their lab, throwing a fair amount of modern ethics out the window (or the sub, if you like) as they race to complete vital experiments in hyperbaric chambers -- the results of which may just change the course of the war. Tune in for part two of this special two-part series, featuring returning guest Dr. Rachel "Big Spinach" Lance, the author of "Chamber Divers: The Untold Story of the D-Day Scientists Who Changed Special Operations Forever."

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