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Giulio Sironi

  • The Deepest Hole in the World, And What We've Learned From It - Duration: 4 minutes, 1 second.

    • 1 year ago
    • 2,741,643 views
    SciShow takes you down the deepest hole in the world -- Russia's Kola Superdeep Borehole -- explaining who dug it and why, and what we learned about Earth in the process. Don't fall!
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