Why This Machine Never Turn Off

This 14,000 ton monster is bigger than most buildings, yet it moves slower than you can walk. Engineers refuse to shut it down, even when there is nothing left to dig. The reason is a staggering cost that most people never think about. Its giant digging wheel is taller than a six story building, and it can chew through a mountain of dirt every single day. Meet the Bagger 293, the machine that never sleeps.