A prehistoric hidden cave and hippo bones found beneath Pembroke Castle could transform understanding of ancient life in ...

Sơn Đoòng Cave lay hidden for millions of years in Vietnam’s dense jungle, until one man stumbled on it by accident and then ...

A single spring deep inside the Grand Canyon supplies water to millions of people and countless plants and animals.

There was a real underground wildlife scene. A groundbreaking survey of previously unexplored caves in Cambodia has yielded 11 species that are new to science, including pit vipers, snails and other ...

A centuries-old legend claims Spanish explorers hid a massive treasure in an Arkansas cave, and no one has ever confirmed its ...

A cave hidden beneath an 11th Century castle in Pembrokeshire is a "truly remarkable site" which could rewrite Britain's ...

Scientists discovered a giant echidna fossil in Australia that shows these animals lived across a wider area during the Ice ...