the sound of humans from the depths of the earth

In 1970, Soviet scientists drilled deep wells "Cola" in the city of Murmansk in Russia began They wanted to do research on the earth's crust, and were seeking to overtake American scientists seek. Because the Americans abandoned this ambitious project in Oklahoma in 1966 But after 24 years of uneasy drilling, the Cola well was stopped in 1994, after reaching 12,262 meters deep, suddenly and without explanation, and the banned area was announced.