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Kola: The World’s Deepest Hole

Jul 7, 2026 · 46m

Summary

Hosts Josh and Chuck explore the Kola Superdeep Borehole, the USSR’s Cold War-era project to drill deeper into Earth than any other human endeavor. They discuss the technical hurdles, such as extreme heat and shifting rock, that halted progress at 7.6 miles, and debunk the urban legend that the Soviets heard screams from hell. The episode highlights scientific discoveries, including ancient fossils and deep underground water, while contrasting Soviet achievements with earlier American attempts.

Topics discussed

Intro, ads, and Simpsons banter Project Mohole and the race to drill deep The Kola Superdeep Borehole: Depth and scale Earth's layers and why we dig holes Drilling challenges: Rock density and heat Scientific discoveries: Water and ancient life Conrad discontinuity and other deep holes German borehole and the 'sounds of hell' Listener mail and outro
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