A weather station in Peter Sinks, Utah, measured a daily low of 50.9 degrees below zero on Wednesday, potentially breaking ...

The limestone mine Elon Musk says handles federal retirement papers is actually a real thing that does in fact function ...

Billionaire tech mogul Elon Musk drew attention to a circa 1960 converted underground limestone mine in Pennsylvania his team ...

The federal government still processes retirement applications manually in a Pennsylvania limestone mine, a system Elon Musk ...

Elon Musk took aim at a limestone mine in Pennsylvania, where they said federal employee retirements are processed using an outdated system.

Sinkholes are most common in areas underlain by rocks like gypsum, limestone and other carbonate rocks, which can be naturally dissolved by groundwater, according to the United States Geological ...

Elon Musk highlights a ‘limestone mine’ in Pennsylvania used for retirement paperwork processing at the Oval Office.

Reliable sinkhole data isn’t readily available to the public. For the fifth time, a Florida congressman is trying to pass a ...

Just about anywhere where you get limestone or dolomite close to the surface, you're going to have concerns with sinkholes. You're going to have concerns with a very fragile groundwater system ...