Most of us think about erosion on the surface of the earth, but erosion can occur in the subsurface as well. In fact, scientist and engineers have a very creative name for just such a process: ...

Authorities fear a woman in western Pennsylvania who disappeared while looking for her cat may have been swallowed by a sinkhole — a phenomenon likely caused by mine subsidence. Search and rescue ...

This is an archived article and the information in the article may be outdated. Please look at the time stamp on the story to see when it was last updated. Authorities fear a woman in western ...