In archaeology, cave paintings are a type of parietal art, found on the wall or ceilings of caves. The term usually implies prehistoric origin. These paintings were often created by Homo sapiens, but also Denisovans and Neanderthals; other species in the same Homo genus. Discussion around prehistoric art is important in understanding the history of the Homo sapiens species and how Homo sapiens have come to have unique abstract thoughts. Some point to these prehistoric paintings as possible examples of creativity, spirituality, and sentimental thinking in prehistoric humans.