A sinkhole is a hole or depression in the ground that forms when a surface can no longer be supported by the land underneath it, the United States Geological Survey explains. Sinkholes can have ...

A sinkhole is a hole or depression in the ground that forms when a surface can no longer be supported by the land underneath it, the United States Geological Survey explains. Sinkholes can have ...

A sinkhole is a hole or depression in the ground that forms when a surface can no longer be supported by the land underneath it, the United States Geological Survey explains. Sinkholes can have ...

Authorities fear a woman in Pennsylvania who disappeared while looking for her cat may have been swallowed by a sinkhole. Here's what to know about sinkholes.