Caves are natural shelters. Throughout our history, humans have made extensive use of them as spaces to create art, inter the dead and butcher animals for food and clothing. In this countdown, Live Science takes a look at seven incredible caves that people used over the ages, leaving behind evidence of their crafts, dead and leftovers. Some of the caves were used by our now-extinct relatives, including the Neanderthals, Denisovans and Homo erectus.
