Deep in the Arctic Circle, there’s a man-made hole that once earned the nickname “the entrance to hell.” The Kola Superdeep ...

Deep in the Arctic Circle, in Russia, lies the deepest hole ever dug which was once called 'the entrance to hell'. The Kola ...

China begins drilling a six-mile-deep scientific well named Shendi Take 1 to explore the depths of the Earth and its secrets.

These altered, hydrogen-producing rocks behave like natural reactors. They offer clues to how deep-ocean chemistry works today and to how early life may have first powered itself billions of years ago ...