The Kola Superdeep Borehole, although only 9 inches in diameter, holds the distinction of being the deepest hole, plunging to ... delving deeper than any other man-made structure.

America might have landed on the moon, but Russia drilled the deepest man-made hole on Earth. Since the early 1960s, scientists have attempted to drill down to the Earth's mantle. It took 20 years ...

The Kola Superdeep Borehole holds the record for being the deepest artificial point on Earth, reaching almost ... ambition to create the deepest man made hole ever. Despite going so deep, the ...

An curved arrow pointing right. A hole in Earth's ozone layer created by man-made substances could be healed by the 2050s. Produced by Noah Friedman. Original reporting by Jessica Orwig.

Now that summer is here, you'll likely be slathering up with sunscreen. Earth, it turns out, is doing the same, according to an encouraging study recently published by a team of scientists at NASA ...