Michael Estabrook

Michael Estabrook

because the workers swore they could hear screams of the poor souls stuck in hell

The Kola Superdeep Borehole was a Soviet Union scientific drilling project on the Russian border with Norway the deepest man-made hole on Earth reaching down to a depth of 40,230 ft. But drilling had to be stopped in 1989 because the heat at that depth turns rock into mud and melted the drill bits. But also—