Originally Posted by johnw
Where does it come from?

How big is the hole it came out of?

Will the planet collapse into that hole?

And will they ever just mine midwestern roadsides for salt?


https://www.detroitnews.com/picture...salt-mine-city-beneath-city/4523991002/?

[Linked Image from gannett-cdn.com]

Originally Posted by jorgeI
...Actually Sycamore, you are sort of right....