Episode Details

For decades, scientists have been puzzled by a mysterious low-frequency hum echoing around the planet — now believed to be generated by ocean swells in the Southern Ocean pressing against Earth’s crust. This planetary heartbeat, detectable by seismometers and even audible when sped up, reveals our planet as a living instrument shaped by natural forces. Recent discoveries, like a Greenland landslide triggering global waves, show how deeply connected Earth’s systems are — and how sensitive our instruments are to the hidden rhythms beneath our feet.

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