Neanderthals were in Europe 100,000+ years ago. Modern humans, H. Sapiens Sapiens, arrived in Europe approx. 80K years ago, by approx. 30K years ago H. Sapiens Neanderthalensis went extinct. Neanderthal and Sapiens were sub-species and interbred. Yet 70% of Neanderthal genes are distributed within today's populations of humans. What events, trends, diseases, life styles, etc. effected Neanderthals to most likely push them to extinction while our sub-species did not suffer the same fate? Any comments, feed-back, references would be appreciated. I recently viewed the PBS documentary "Neanderthal" on Kanopy.com. I can not see any reason(s) why we survived as a unique species versus a hybrid species.