A trip to a remote cave in northern Greenland previously only seen from the air uncovered fascinating information about the area's climate millions of years ago. These images from expedition photograp ...

The discovery of more than 100 prehistoric structures in the Cova Dones cave in Spain makes it one of the most significant prehistoric underground sites in the world. Archaeologists found stalagmites ...

The Chinhoyi Cave system consists of a series of interconnected tunnels and chambers. These tunnels are formed by ancient ...