Earliest finds are Mousterian stone tools from 33,000 years ago. Upper Paleolithic rock paintings and drawings of the Kapova Cave, Burzyansky District of Bashkortostan in the southern Ural mountains are 16,000 years old. Artwork comparison suggests a commonality of cultural processes from the Atlantic to the Ural in the Paleolithic era. Identified are more than 50 drawings by S. Lyahnitskogo of the Russian Geological Institute and the Russian Geographical Society. Drawings are executed with ochre, natural pigments mixed with animal fat, depicting mammoths, horses and other animals, complex characters and anthropomorphic figures.