In northwestern Russia, on the Kola Peninsula, there's a metal cap covering a hole that scientists dug 7.5 miles down. Here's the story of the Kola Superdeep Borehole project. Plus, a classic rock band finds out what it's like to be in the financial hole, on a resource-intensive US tour.
Beneath this Metal Cap is the World's Deepest Hole (Slate)
Greg Lake (The Times)
