Monorails used to be the vision of futuristic travel. Now, that mode of transit has been mostly reduced to inter-terminal airport travel and family theme parks. Take a step back in time and gander at these bullet-shaped babies in action.
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.