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The Deepest Man-Made Hole on Earth
The deepest hole drilled by man on Earth is located on the Kola Peninsula and is currently called "Kola Superdeep Borehole" (KSDB). It is east of Finland in Russia. It's 12km north of the city, Zapolyarniy. The dig began in 1970 and the Soviet's goal was to reach the "Mohorovičić discontinuity" or "Moho" which is where the crust and mantle intermingle. They never reached their goal and the hole currently is "only" 7 miles (12.262 km) deep. That's 40,230 feet.
The previous record holder was the Bertha Rogers well in Oklahoma. It was a gas well and it stopped at 32,000 feet when it struck molten sulfur. stink-o. Most normal oil wells go 10,000 to 16,000 feet deep. The purpose of the Kola Superdeep Borehole is not for oil/gas development or other monetary value. Its purpose is strictly for science. Digging really deep holes for the study of science began about 30 years. So far, 13 countries have drilled nearly 100 holes in continents across the globe, 20 of which are between four to five
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