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How far have humans been able to drill into the Earth? ​
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How far have humans been able to drill into the Earth? ​

User Odney
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Answer:

Known as the Kola Superdeep Borehole, the deepest hole ever dug reaches approximately 7.5 miles below the Earth's surface (or 12,262 kilometers), a depth that took about 20 years to reach

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User Mweststrate
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