Two 325-million-year-old ctenacanth shark fossils discovered in Mammoth Cave shed light on ancient marine ecosystems.

Hang Son Doong is the world's largest known cave, with enough space in some of its passages to fly a Boeing 747 airplane through them. The limestone cavern sits beneath a lush jungle in Vietnam's ...

Thanks to discoveries made during a recent expedition in Vietnam, it appears the world’s largest cave, Son Doong, is even bigger than previously thought. Last month, a trio of British divers ...

A recent study has led a group of researchers to discover the fossilised remains of two species of prehistoric sharks. They were located in the deepest layer within Mammoth Cave Na ...

the Son Doong Cave holds the title of the largest natural cave in the world. The cave, which measures over nine kilometers in length with a volume of 38.5 million cubic meters, is so massive it ...

THE world's largest cave transports you back to a time long before humans ever existed with its own underground weather system, mysterious river and rain forest. Hang Son Doong in Vietnam is ...

But sometimes we forget another unmapped mystery, often nearer at hand: subterranean caves. The world's largest cave is on the border of Vietnam and Laos. Half a million tourists visit Mammoth ...

For 18 more years, the cave remained unexplored. Then, in 2009, two British cavers dropped into Son Doong and discovered the largest cave on Earth. The Son Doong is over 5.5 miles long and could ...

the longest cave system in the world. Mammoth Cave is a treasure trove for ancient fish fossils, with more than 70 different species identified within its walls, according to a 2024 study ...

Here’s how it works. Why it's incredible: The cave is the biggest in the world and contains two jungles. Hang Son Doong is the world's largest known cave, with enough space in some of its ...