Generally-small and widely dispersed fossil sites suggest that Neanderthals lived in less numerous and moresocially-isolated groups than "Homo sapiens". Tools and Levallois points are remarkably sophisticated from the outset, but they have a slow rate of variability, and general technological inertia is noticeable during the entire fossil period. Artifacts are of utilitarian nature, and symbolic behavioral traits are undocumented before the arrival of modern humans. The Aurignacian culture, introduced by modern humans is characterized by cut bone or antler points, fine flint blades and bladelets struck from prepared cores, rather than using crude flakes. The oldest examples and subsequent widespread tradition of prehistoric art originate from the Aurignacian.