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Turning this machine off is so insanely expensive that engineers literally leave it running forever. It weighs over 14,000 tons and is bigger than most buildings. But it moves so slowly that you could easily out-walk it. The crazy part is, even when there is no work to do, they never hit the off switch. Bringing this massive engine to a full stop and starting it back up burns through so much energy and money that it's actually cheaper to keep it running 365 days a year. That's why the Bagger 293, the largest land vehicle in the world, never sleeps.