Note: We (people) have not even dug down through the Crust to reach the Mantle. The deepest man-made hole on Earth and deepest artificial point on Earth, the Kola Superdeep Borehole, is 40,230 feet (about 7.62 miles) deep.
Michael Fry
June 23, 2017
June 25, 2017
July 23, 2017
October 20, 2017
November 14, 2017
Note: We (people) have not even dug down through the Crust to reach the Mantle. The deepest man-made hole on Earth and deepest artificial point on Earth, the Kola Superdeep Borehole, is 40,230 feet (about 7.62 miles) deep.