What All the Metal From a Single Mine Would Look Like As a Giant Orb

Of all the ways humans have altered the Earth, mining must be one of the most awesome—just for the sheer ratio of Earth excavated to metals and gems recovered. Still, it's hard to visualize just how much a single mine has netted in numbers, which is why For What It's Worth is so interesting. » 8/18/14 9:00am Monday 9:00am