They are every kid's dream, massive digging toys on a scale nearly impossible to visualize. And yet, these monstrous earth biters are not only real, they are super machines. From the truly gargantuan Bagger dragline excavator that can produce enough raw material to power a small city in a day, to the massive Big Red oil pump that puts a new spin on an age-old tech. How do you design a dump truck and excavator that are taking us into the new generation of climate friendlier mining monsters that can still do the job? And why does a colossal machine the size of a building 'walk' between its job sites? These truly are some of the biggest most powerful mechanical feats humans have ever built.