World
The deepest well in the world was dug by the Russians to reach the Mohorovičić Discontinuity
It is known as the boundary zone between the Earth’s crust and the Earth’s mantle.
Almost everyone has heard of the Mariana Trench, the deepest place in the ocean, but not the Kola Superdeep Borehole, the deepest borehole in the world at no less than 12,262 meters (or 40,229 feet). It was created by the Soviet Union in 1970 and worked on until 1994.
The great powers not only fought relentlessly to be the pioneers in the space race, they also planned to reach the center of the Earth. The main purpose of such a borehole was to study the Earth’s crust, to examine rocks and minerals at a depth that no human being had ever been able to reach.
12,262 meters (or 40,229 feet) deep is really crazy, but as you can see, it is far, far away from the center of the Earth. In fact, the core of the planet is more than 5,000 kilometers (3106.85 miles) deep. In fact, the Earth’s crust alone can measure up to 70,000 meters. The mantle, consisting mainly of molten iron, measures almost 3,000 kilometers (1864.11 miles). These figures mean that the Russians barely managed to travel a little less than 0.2% of the distance between the surface and the center of the Earth.
Once these more than 12,000 meters were drilled, things became virtually impossible as temperatures exceeded 170° Celsius (338° Fahrenheit) and drilling became increasingly difficult. The most significant finding during the exploration of the well was the discovery of several fossils of single-celled marine animals. Drilling was stopped in 1994 and the well was permanently sealed in 2005.
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