Sinkholes are fairly common in Philadelphia due to aging water lines that leak or burst, causing the surrounding soil to wash ...

The latest sinkhole on a Morris County interstate, based on preliminary inspections, looks to be caused by an abandoned pipe.

Add Yahoo as a preferred source to see more of our stories on Google. Sinkholes form when underground rock dissolves or sediment washes away and the surface collapses. Luis Diaz Devesa/Moment ...

(The Conversation is an independent and nonprofit source of news, analysis and commentary from academic experts.) Laura Toran is a hydrogeologist and professor emeritus of environmental geology at ...