Authorities maintain 24/7 search for a motorcyclist believed to have fallen into a complex underground cave system.

A federal court has approved a class-action settlement between West Virginia landowners and what is believed to be the nation ...

Understanding how Earth's climate has naturally fluctuated during the Holocene—the current geological epoch spanning the last ...

The Xiaozhai Tiankeng stands as the textbook example of what happens when karst processes are given perfect working ...

The Xiaozhai Tiankeng, often called the “Heavenly Pit,” stands as the planet’s largest and deepest known sinkhole. This ...

A new study published in Nature Cities found that 25 of the 28 largest U.S. cities are sinking.San Antonio is sinking at a ...

Excessive ground subsidence could cause major infrastructure issues in the coming decades, a recent study found ...

Data shows that the main causes of sinkholes are excessive underground development, the rupturing of old water supply and sewage pipes, groundwater leakage and ground instability caused by ...

In many cases, the collapses have been linked to unstable soil conditions caused by construction, groundwater shifts, or ageing underground utilities such as water and sewage pipes. Sinkholes are ...

or rocks—all of these materials can be dissolved by groundwater. Sinkholes can vary in size and depth, "from a few feet to hundreds of acres and from less than 1 to more than 100 feet deep ...

“Commission staff are monitoring conditions within and around the sinkhole and considering options for addressing any concerns about groundwater quality.” The Kelton Ranch is a few miles ...