[ad_1] The Kola Superdeep Borehole in Russia is the deepest hole ever drilled, reaching 7.6 miles deep in 1981. It only penetrated a third of the Baltic continental crust and discovered 2.7 billion-year-old rock. Rumors of reaching hell were false, but interesting discoveries were made, including pockets of water and excess hydrogen. The deepest hole […]
[ad_1] The Kola Superdeep Borehole, drilled by Soviet engineers from 1970 to 1994, reached a depth of 7.6 miles (12.3 km) and helped researchers discover that the granite rock layer extends deeper than previously thought. It also revealed two billion-year-old microscopic plankton fossils. The earth’s crust is about 25 miles (40 km) deep and temperatures […]
