The Cold War
Some individuals even assume we know more about space than what is underneath the earth’s surface. We know that at least during the height of the cold war, you heard about a space race in which the US and Soviet Union came. But not many people know what the underground is all about.
The Cold War
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Race To The Depths
From the late ’50s on, US and Soviet scientists began to conduct crust penetration tests. This section of the world extends to the center of the earth for up to thirty kilometers.
Race To The Depths