The Soviets Drilled the Deepest Hole Ever
SMRTR summary
The Soviet Kola Superdeep Borehole, drilled starting in 1970, reached over 40,000 feet, making it the deepest hole ever dug. Though it never reached its target, it overturned geological assumptions, revealing the deep crust was hotter, wetter, and more chemically active than scientists believed.
SMRTR provides this summary for quick context. The original article belongs to Nautilus.
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