From the deep ocean floor to vast underground caverns beneath our feet, these places challenge our understanding of the world.

Stretching for hundreds of miles on the Arctic Circle, the Kola Peninsula is one of the most breathtaking places in Russia. Dubbed "Land of the Snow Queen," it is bordered by dense forests and the ...

humans love to dig a deep hole from mine excavators to sandbox players to JK Rowling we always ask can I go any lower I'm no exception I've heard the call so many times there's a song about it saming ...

A team of Japanese researchers hopes to drill through the Earth's crust and reach the mantle directly. This would be a major achievement; our efforts to reach the mantle to-date have not been ...