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The deepest hole humans ever drilled reached seven miles down before it had to stop
On the Kola Peninsula in the far northwest of Russia, near the border with Norway, sits a rusted metal cap bolted over a hole barely nine inches wide. That unremarkable seal covers the deepest ...
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Why the deepest hole on Earth was sealed, and what they discovered before it was closed!
Deep in the Arctic Circle, there’s a man-made hole that once earned the nickname “the entrance to hell.” The Kola Superdeep Borehole, the deepest hole ever drilled on Earth, reached a staggering 12 ...
Add Yahoo as a preferred source to see more of our stories on Google. The deepest hole humans have ever drilled into the Earth is just 12.3 kilometers, about 0.2% of the distance to the planet's core.
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