ISLA: To Traligill Caves! They’re in the North West Highlands ... Limestone is a sedimentary rock created by layers of skeletons and shells of sea creatures found in ancient, warm, shallow ...

Exploration of caves at different altitudes has revealed archaeological ... especially the repeated inundation of the landscape by the sea after the last ice age. The story of human occupation ...

the sea level was lower, and the region that's now the coast of South Africa was a few miles inland. "Instead of being right on the water like they are today, these caves would have been near vast ...