The world’s largest moving object, the Bagger 288 Superexcavator, leaves virtually no tracks, even over grass. The sheer surface area of the tracks makes its ground pressure less than a barefoot person.
The deepest gold mine in the world, the Mponeng mine in South Africa, reaches roughly 2.4 miles below the surface. Illegal miners in the deepest areas stay down for months; lack of sun causes their skin to turn grey and they are referred to as ‘ghost miners’.
Picher, Oklahoma is considered the most toxic place in the United States. The town has been ravaged by industrial mining; so much so that a majority of it’s inhabitants have fled and it’s current population is 20. There have been numerous reports of sinkholes appearing overnight as mine shafts collapse. Often, underground water, highly acidic and concentrated with heavy metals, come bubbling into these sinks and turns them into toxic ponds.
There is a diamond mine so large that it creates air currents that can suck a helicopter into it.
They are now hiring asteroid miners.