The longest mapped network of caves in the world also contains one of the most implausible marine collections in North America. In Mammoth Cave, sharks and their kinsmen are preserved in layers of ...

The county said a cave collapse formed a large hole, revealing a 200 foot cavern underneath. Three homes sit on top of it. KVUE spoke with Jay Banner, geosciences professor at The University of Texas.

ALBUQUERQUE, N.M. — The Big Room at Carlsbad Caverns, a room that could fit more than six football fields and reach the height of a 30-story building, inspires awe among visitors, but it’s a nagging ...

Step off the desert trail and into Arizona’s longest cave, where crystal formations and subterranean wonders await.

Named Colossal Cave, with more than two miles of passageways that have been explored and mapped, it is likely that there are still areas that have never been seen. Tours of the cave, where the ...

Below the Chihuahuan Desert in southeastern New Mexico, lies an extensive system of limestone caves, among them the famed Carlsbad Cavern, home to one of North America's largest underground chambers.

Dawn Ryan (front), cave manager at Forestville/Mystery Cave State Park in southeast Minnesota's Fillmore County, and Krista McDermid from Zara Environmental during recent research to inventory animal ...

TimesMachine is an exclusive benefit for home delivery and digital subscribers. About the Archive This is a digitized version of an article from The Times’s print archive, before the start of online ...

Boulder, Colo., USA: A study published on Friday in the journal Geology uses isotopes of sulfur to fingerprint the sources of sulfuric acid that have carved unique and beautiful cave systems in the ...