With over 400 mapped miles, Mammoth Cave National Park, just outside Bowling Green, Kentucky, is the longest known cave system in the world. The only way to see its many subterranean rooms and ...

The fossil was found in the Ste. Genevieve Formation, which dates to approximately 335 to 340 million years ago. It was discovered by a combined team of scientists from the National Park Service ...

A remote cave system nestled along the border of Greece and Albania has revealed what may be the largest known spider colony ...

Researchers may have discovered the world's biggest spider web, a massive subterranean structure spanning over 100 square ...

A rare bite into the past. The fossilized tooth of a newly discovered ancient shark species – dating back about 340 million years – has been unearthed in the world’s largest cave system, officials ...

To date, the Shuanghe Cave system has 115 confirmed entrances and remains the world's third-longest cave and the longest in Asia.

About 340 million years ago, a tiny shark swam in the waters of the world’s longest cave system in Kentucky, its unusual mouth curved in a way that will ultimately end up defining its future legacy.

Putting in a modern sewer system in 1989 allowed the town to open Hidden River Cave to visitors. Building the stairs, trails and a museum cost an additional $6 million, which came from grants and ...