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Show notes
It was the early '80s, the height of the Cold War, when something strange began happening off the coast of Sweden. The navy reported a mysterious sound deep below the surface of the ocean. Again, and again, and again they would hear it near their secret military bases, in their harbors, and up and down the Swedish coastline. After thorough analysis the navy was certain. The sound was an invasion into their waters, an act of war, the opening salvos of a possible nuclear annihilation. Or was it? Today, Annie McEwen pulls us down into a deep-sea mystery, one of international intrigue that asks you to consider the possibility that maybe, just maybe, your deepest beliefs could be as solid as...air. _Special thanks to_ Ben Wilson, Ola Tunander, Hans Gordon, Andreas Timmelstad, Klaus Helmersen, and Meg Bolz. **LATERAL CUTS -** - [https://radiolab.org/podcast/atomic-artifacts"]( Atomic Artifacts ([https://radiolab.org/podcast/atomic-artifacts)](https://radiolab.org/podcast/atomic-artifacts%29 ) - [https://radiolab.org/podcast/confirm-nor-deny"]( Neither Confirm Nor Deny ([https://radiolab.org/podcast/confirm-nor-deny)](https://radiolab.org/podcast/confirm-nor-deny%29 ) **EPISODE CREDITS:** Reported by - Annie McEwin with help from - Magnus Ormstadt Produced by - Annie McEwin, Matt Kielty, Sarah Qari Original music and sound design contributed by - Jeremy Bloom _Sign up for our newsletter!! It includes short essays, recommendations, and details about other ways to interact with the show._ [https://radiolab.org/newsletter"]( _Signup_ ([https://radiolab.org/newsletter)!](https://radiolab.org/newsletter%29! ) _Radiolab is supported by listeners like you. Support Radiolab by becoming a member of_ [http://members.radiolab.org"]( _The Lab_ _( today._ _Follow our show on_ [http://instagram.com/radiolab"]( _Instagram_ _,_ [http://twitter.com/radiolab"]( _Twitter_ _and_ [http://facebook.com/radiolab"]( _Facebook_ _@radiolab, and share your thoughts with us by emailing_ [_radiolab@wnyc.org_](mailto:radiolab@wnyc.org)_._ _Leadership support for Radiolab’s science programming is provided by the Simons Foundation and the John Templeton Foundation. Foundational support for Radiolab was provided by the Alfred P. Sloan Foundation._ Hosted by Simplecast, an AdsWizz company. See [pcm.adswizz.com]( https://pcm.adswizz.com">pcm.adswizz.com for information about our collection and use of personal data for advertising.