By Oobject.com

15 Monstrous Mining Machines

With the recent rescue of the 33 Chilean miners, we've got mining on the brain. How do they create those crazy tunnels deep in the earth? With these spinning, churning, crushing machines of mayhem and destruction, that's how.

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For some more tunneling, drilling, and mining fun, check out 9 incredibly impressive mining diagrams, ferocious oil drill bits, the extreme hardware that lets us collect oil and gas, 12 of the world's most fascinating tunnel networks, and some spectacular sewer systems. [Oobject]