7 of the Deepest Holes Humanity Ever Dug
(via Popular Mechanics) We can’t dig to the center of the Earth, but that hasn’t stopped us from trying. Whether explicit efforts to dig through the Earth’s mantle or some of the world’s wildest open-pit mines, humankind has done some serious digging. Popular Mechanics explores some of the craziest manmade holes out there through both ice and land.
