Mammoth Cave, the world's longest known cave system, stretches 426 miles under Kentucky. The cave's limestone began forming 330 million years ago when the region was submerged under an ocean. Visitors ...

IPOH: Hidden within a former tin mining pond in Malim Nawar near Kampar is a rare geological feature, towering limestone ...

Excavated from a hayfield near Warrensburg, Fossil Pond and its limestone evoke an age 300 million years ago when a vast sea covered much of the Midwest, including Kansas City. Gary Rhoades From a ...

About 150 million years ago powerful storm winds buffeted two young pterosaurs, snapping forelimb bones in their fragile wings and sending them hurtling to their deaths in the muddy depths of a lagoon ...