In this episode, we hear how some very peculiar sounds kept residents in Florida and San Francisco awake at night. Was it UFOs? Naval testing? The nearby sewage facility? Or was it  something far fishier? We also hear how a similar story nearly led to a war between Soviet Russia and Sweden.

Special thanks to our guests: Bob Heyman, Kirk Lombard, Prof Andrew Bass, Dr Ni Feng, and Prof Magnus Wahlberg.

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