The Kola Superdeep Borehole in Russia is the deepest hole ever dug by humans — plunging over 12 kilometers (7.5 miles) into the Earth's crust.
Scientists hoped to reach Earth’s mantle, but what they discovered instead was unexpected — extreme temperatures, strange sounds, and geological mysteries.
🔍 This video explores the history, purpose, and eerie facts behind the deepest man-made hole on Earth.
❗ Watch till the end for strange theories and what scientists found at the bottom!
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