The fossilized remains of a newly discovered ancient shark species found in the depths of Kentucky’s Mammoth Cave National Park reveal not the sharp, pointy gnashers you’d associate with Hollywood’s ...
Hang Son Doong is the world's largest known cave, with enough space in some of its passages to fly a Boeing 747 airplane ...
Ancient humans came together 35,000 years ago in the deepest, darkest part of a cave in what is now western Galilee, Israel, to hold ritualistic gatherings. This appears to be the earliest known ...