The physics of granular jamming and friction ...

Beneath rolling hills and quiet forests in Kentucky lies a hidden world so vast that scientists are still discovering new life inside it. Mammoth Cave National Park, home to the world’s longest known ...

There’s a cave in Illinois that watches the Ohio River go by. It’s big, strange, and way more memorable than expected.

NPCA answers frequently asked questions about the latest attempt by Cadiz Inc. to drain the Mojave Desert’s groundwater for profit.

A casual hike in rural Tennessee turned into an unexpected underground adventure after a young explorer followed a small hole ...

This makes the story of how the Green and Colorado Rivers met so perplexing to geologists like Adam Smith at Scotland’s University of Glasgow. According to the coauthor of his team’s study published ...

Lost River Cave is hosting the 12th annual Snow Flurry Scurry 5K on Saturday, Feb. 7. According to event organizers, the race was postponed due to weather and will now take place at 9 a.m., with ...

The Limestone Cave is part of Lyle's arc in the past, which means you need to be able to access this location for the main ...

Belgium 's hidden gems aren't just found above ground. The country is home to some of the most amazing cave systems that ...

The Hinatuan Enchanted River in the Philippines is a popular but protected area where tourists cannot swim during fish feeding hours ...

A man discovered something unbelievable beneath his own home - a river cave running underground. But the real shock came deeper inside, where the cave opened into a massive 280-foot waterfall hidden ...

Arizona is home to more than three dozen national parks, sites and monuments. These 10 easy to moderate hikes show off the ...