Hidden deep in the heart of New Mexico lies a frozen world that defies its desert surroundings. While temperatures outside ...

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

In the high desert of western New Mexico, a pocket of ancient ice has quietly endured while summer temperatures soar above it. Tucked inside a lava tube beneath an old volcanic field, this frozen ...

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 ...