What’s at the Bottom of the Deepest Hole on Earth?

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The Deepest Holes On Earth
People have been curious about what's under the Earth for a really long time. At first, we could only explore natural holes, and many of them were not explored until recently. In the 1900s, machines helped us dig really deep into the Earth. But, how deep have we actually gone?
In this collection, we'll show you the deepest holes on Earth, whether they're natural or made by humans.

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