It's science time! Evolutionary biologist Dan Riskin joins David to inform us that rattlesnakes enjoy cuddling. Then, it's tangent time as they discuss the fables of The Tortoise and the Hare, The Scorpion and the Frog, and a terrifying tarantula story – during which Riskin crescendos to profanity (bleeped by request). Due to Dan's use of the f-word, the two engage in a conversation about profanity in broadcasting. Additionally, one of the most best TV news moments is brought up: Mike Tyson swearing on live television. Somewhere amidst this chaotic episode, two more science news items emerge: people's willingness to endure pain in order to learn more quickly, and how helping young people feel competent and purposeful – not just happy – may improve grades.

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