Speleothems, or dripstones, are excellent climate archives because the chemical composition of the calcium carbonate in speleothems changes with the climatic conditions above the cave. The picture ...

Ancient humid periods made Arabia a lush pathway for animals and early humans Researchers analyeed 22 speleothems — mineral formations that develop in caves — from seven systems in the Duhool ...

People who lived in the Arabian Peninsula thousands of years ago went underground when they wanted to beat the heat. Possibly ... to the north of Medina in Saudi Arabia is a tunnel system called ...