Kola Superdeep Borehole: The Deepest Hole Ever Drilled
A solitary borehole in the Russian tundra plunges 12 kilometers, making it the deepest ever drilled. The Kola Superdeep…
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A solitary borehole in the Russian tundra plunges 12 kilometers, making it the deepest ever drilled. The Kola Superdeep…