daily photo blog by Alicia Millane

Saturday, May 25, 2024

May 25, 2024

Known as the Kola Superdeep Borehole, the deepest hole ever dug reaches approximately 7.5 miles below the Earth’s surface (or 12,262 meters), a depth that took about 20 years to reach.

- Scientific American (February 22, 2020)

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