[squarebarb]

Thanks, Blam.

I read somewhere that earthworms turn over the soil and gradually cause foundations, etc. to sink over the centuries.

I think I read that in a book on Roman ruins. So maybe that’s it.

[tripod]

Earth worms! And all along I thought it must somehow have been the fault of one of George Bush’s ancestors.

[RonF]

In downtown Chicago there are numerous buildings that appear to have been built at street level. But if you go into the basement, you see large entrances and windows. Chicago flooded so often that in the mid-1800s the entire downtown area was built up with fill to raise the street level one full floor.

[blam]

"I read somewhere that earthworms turn over the soil and gradually cause foundations, etc. to sink over the centuries."

The major ground tillers (earth worms) in this area have been replaced with the Fire Ant. The Fire Ants till the soil more than the earthworms now.