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The deepest hole humans have ever dug

We know that there is oil beneath the earth’s surface, and that humans drill for that oil every single day. This requires a hole to be dug deep enough to reach the oil. So if the earth’s continental crust is between 30 and 50 miles thick, how deep do you think humans have dug? Check out this video to see a comparison of how deep humans have gone into the earth’s crust.

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