A look at the deepest hole in the entire world

Russia is home to one of the most important landmarks in the world as far as science is concerned. One of the main reasons for this claim is because not only is the hole the deepest in the world, it has not been completely figured out yet. It is known as the Kola Superdeep Borehole.

It goes as deep as 12 kilometers as it has been drilled for up to 24 years. That is a very long time to be drilling holes. But that is not the only interesting aspect of the Kola Superdeep Borehole. The drilling only stopped because the temperature at the bottom of the hole was so high that going further deep was not feasible.