The Lava River Cave outside of Bend is a mile deep and 60 feet tall. Here's how to explore Oregon's longest lava tube.

The Carlsbad Caverns are a New Mexico gem located in the Guadalupe Mountains. It’s one of over 300 limestone caves, with a fossil reef stemming from approximately 265 million years ago. Inside the ...

The Saint-Marcel cave network in southern France has long captivated the imaginations of explorers and scientists alike. Its ...

The Trump administration has cut staff by more than 24% at the National Park Service since January. Republicans in Congress ...

National Park Service researchers have identified a previously unknown shark species in the limestone walls of Mammoth Cave, ...

MAMMOTH CAVE, Ky. — A new-to-science species of ancient shark was recently discovered in Mammoth Cave National Park in ...

A newly identified ancient shark species, Macadens olsoni, has been at Mammoth Cave National Park. The National Park Service says Macadens olsoni likely measured less than a foot long and featured ...

A newly identified ancient shark species, Macadens olsoni, has been at Mammoth Cave National Park. The National Park Service says Macadens olsoni likely measured less than a foot long and featured a ...

Fossils of an ancient shark species have been discovered in a Kentucky cave, park officials announced (Mammoth Cave National Park) ...

With more than 40 different species of fossil sharks and relatives identified from Mammoth Cave specimens in the past 10 months, the survey has revealed a new discovery.