Full context:   Prehistoric music can only be theorized based on findings from paleolithic archaeology sites. The disputed Divje Babe flute, a perforated cave bear femur, is at least 40,000 years old, though there is considerable debate surrounding whether it is truly a musical instrument or an object formed by animals. The earliest objects whose designations as musical instruments are widely accepted are bone flutes from the Swabian Jura, Germany, namely from the Geissenklösterle, Hohle Fels and Vogelherd caves. Dated to the Aurignacian (of the Upper Paleolithic) and used by Early European modern humans, from all three caves there are eight examples, four made from the wing bones of birds and four from mammoth ivory; three of these are near complete. Three flutes from the Geissenklösterle are dated as the oldest, c. 43,150–39,370 BP.[n 3]