Stunning Photos, Trip To The Deepest Hole On The Earth
Today, the deepest hole ever created
by humankind lies beneath the tower enclosing Kola’s drill. A number of
boreholes split from the central branch, but the deepest is designated
“SG-3,” a hole about nine inches wide which snakes over 12.262
kilometers (7.5 miles) into the Earth’s crust. The drill spent
twenty-four years chewing its way to that depth, until its progress was
finally halted in 1994, about 2.7 kilometers (1.7 miles) short of its
15,000-meter goal.
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