https://en.wikipedia.org/wiki/Bagger_288
Engineering: https://www.youtube.com/watch?v=0pb00bMg1iE
Pop Culture Song: https://www.youtube.com/watch?v=azEvfD4C6ow
The next great leap forward is projects such as the "Infinity Train" that aim to recover electricity from the annual lowering of almost a billion tonne of iron ore per annum to sea level from an inland height of some 600m above MSL.