The deepest vertical borehole ever drilled reached 12,262 metres into the Kola Peninsula in 1989. Wo...
The deepest hole ever drilled into the Earth reached just over 12 kilometres before the rock at the bottom turned so hot and plastic that it flowed back into the shaft, and for two decades of effort the drill had covered about two tenths of one percent of the distance
The deepest vertical borehole ever drilled reached 12,262 metres into the Kola Peninsula in 1989. Work had begun in 1970. By the time active drilling ended...
Author: Space Daily
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