"Two re-analyses of hominid skeletal material from sites dated to the transition between Middle and Upper Paleolithic in Europe reported in the journal Nature on Thursday have added to the debate over when early modern humans first arrived and spread into Europe, and how much of the creative invention which marks the Upper Paleolithic can be attributed to Neanderthals." http://archaeology.about.com/b/2011/11/04/when-did-early-modern-humans-get-to-europe.htm

The abstract for the two papers are at http://www.nature.com/nature/journal/vaop/ncurrent/full/nature10484.html http://www.nature.com/nature/journal/vaop/ncurrent/full/nature10617.html but the papers are behind the normal pay wall Bob