Secret spy messages are "hiding" in the airwaves all around us. It may sound like another Internet conspiracy theory, but this one is the real deal. Shortwave radio transmissions are among the most reliable ways for military, government, and intelligence agencies to exchange information. And every day for the last 40 years, one shortwave radio station called UVB-76 has been broadcasting static, beeping patterns, and cryptic Russian messages to ... someone. The contents of the messages are unknown — they are re-encrypted regularly. Anyone can listen, but only the intended recipient(s) can decode them. But that doesn't stop a thriving community of online listeners who stream these stations for the entire Internet to hear, in the hopes of finding patterns or clues.

Alli and Lindsey speak with ZapdoZ, a YouTube streamer who also moderates a large Discord server devoted to cataloging the cryptic messages of this Russian military shortwave transmission. He explains the difference between Numbers Stations (for spies) and Military Stations (for armed forces), why streamers use spectral analysis to "look" at the sound, and how chatter on these stations may have hinted at the Russian invasion of Ukraine.

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