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rusty metal lid
World’s deepest hole dubbed ‘well to hell’
Earth’s deepest artificial hole stretches more than 12,000 metres below the surface — but it’s only covered by a rusty metal lid. Russia’s Kola Superdeep Borehole was created by the Soviets in the name of science so they could learn more about what’s really under our feet and dig to depths unknown. The project to …
