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…
A solitary borehole in the Russian tundra plunges 12 kilometers, making it the deepest ever drilled. The Kola Superdeep…