This endeavour, known as the Kola Superdeep Borehole, proved more successful, penetrating deeper into the Earth and yielding samples that continue to astound scientists. The Kola Superdeep ...
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 ...