The Cold War
Some people even believe that we know more about space than we do about what lies beneath the surface of the earth. As far as we know, you may have heard about a space race between the United States and the Soviet Union at some point during the Cold War’s heyday. However, only a small number of people are aware of the underground’s existence.
The Cold War
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Race To The Depths
Scientists in the United States and the Soviet Union began conducting crust penetration tests in the late 1950s. This section of the world stretches for up to thirty kilometers to the center of the earth, and it is the longest section of the world.
Race To The Depths