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Kola superdeep borehole | What are the Russians hiding

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In 1979, the Kola Superdeep broke the world record for drilling depth - 9583 meters, which was held by the state of Oklahoma since 1974. What was found deep underground? Kola ultra-deep well - the deepest well in the world, SG-3, reached a final depth of 12,262 meters in 1989. The video will consist of two parts. This is the first part. === ✓ Subscribe to the channel - there are many more new and exciting things ahead of you:

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