Complex sentence: Bruniquel Cave is an archeological site near Bruniquel, France which contains cultural artifacts believed to have been created by Neanderthals 176.5 thousand years (± 2.1 thousand years) ago.
Split into simpler sentences: Bruniquel Cave is an archeological site near Bruniquel, France which contains cultural artifacts believed to have been created by Neanderthals. The artifacts are dated to 176.5 thousand years (± 2.1 thousand years) ago.