Hidden inside Vietnam’s Phong Nha-Ke Bang National Park is Son Doong, the largest cave on Earth. It’s so vast that a Boeing ...

A local resident stumbled upon the remains of the 19,700-year-old beast. Its record-breaking horn offers new insights into life in the Ice Age.

Moaning Cavern near Vallecito features the largest single cave chamber in California, where adventurous visitors can rappel 165 feet to the bottom. California Cavern in Mountain Ranch offers walking ...

Moaning Cavern in nearby Vallecito features the largest single cave chamber in California, where you can actually rappel 165 feet to the bottom if walking down the spiral staircase isn’t adventurous ...

Fifty-two fossils of gigantic pandas found in China’s Shuanghe Cave, the longest cave in Asia, reveal the species’ evolution.

It could’ve been worse. For nearly two decades, California desert visitors hoping to see the caverns’ massive stalagmites and ...

A new study reveals that the largest lunar crater, South Pole-Aitken basin, was formed by an oblique impact that shaped the ...

UChicago-led study analyzes massive galaxy clusters mapped by the Dark Energy Survey, offers new way to probe cosmic laws ...

A new species of dome-headed dinosaur has been discovered in fossils found in Montana, according to researchers.

Most comprehensive study of the temple complex and its surrounding land and water scapes identifies the earliest period of ...

At the bottom of a 500-foot deep cave lies a stunning discovery - a deep blue hole hidden from the world above. In this video ...