Thursday, December 27, 2012

The Biggest Man-made Hole In the World

This ginormous hole seems like a scene from some movies that tackle "end of the world" subject. But in reality it's a diamond mine located in Mirna, Siberia. It measures 525 m deep and 1.25 km in diameter, making it the biggest man-made hole in the world. The suction from the hole is so powerful that helicopters flying over it can actually crash.
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