来自MSN9 天
Kola Superdeep Borehole: The Deepest Hole Ever Made
The Kola Superdeep Borehole, dug during the Cold War, remains the deepest hole ever made by humanity. In this video, we ...
The Sun19 天
Earth’s most terrifying holes from 40,000ft Soviet ‘well to hell’ to Mexico’s ...
The official name for the so-called "well to hell" is the Kola Superdeep Borehole SG-3 – but that's not as catchy. It's currently the deepest man-made hole on Earth, reaching a dizzying 40,230 ...