Listen to the sounds from the deepest hole ever dug into the Earth crust

I think you’d enjoy this story @Documentally – sounds from the deepest hole ever dug into the Earth crust https://t.co/Hn0mfgNpNC

— ilicco (@ilicco) February 4, 2017
https://t.co/Hn0mfgNpNC
 
Posted February 04, 2017 at 04:51PM , on Facebook

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