πŸ“‘ The deepest hole we have ever dug

Bookmarked The deepest hole we have ever dug (bbc.com)

During the Cold War, the US and Soviets both created ambitious projects to drill deeper than ever before.

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Marginalia

When Dutch artist Lotte Geevan lowered her microphone protected by a thermal shield down the German borehole, it picked up a deep rumbling sound that scientists couldn’t explain, a rumbling that made her β€œfeel very small; it was the first time in my life this big ball we live on came to life, and it sounds haunting,” she says. β€œSome people thought it did sound like hell. Others thought they could hear the planet breathe.”

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