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

According to the BBC, locals say the hole, located near the Kola Peninsula in ... who worked on a similar borehole project in Germany commented on the Russian hole saying, "When the Russians ...

Scientists now know how to drill deep enough to tap into an energy supply that would power the world for more than 20 million years if we capture just 0.1 percent of it.