You must be slow, because the studies show man is not related, not descended and doesn't share a common ancestor with Neaderthals.
Here's some "fictional" studies for you:
Laitman, J.T., J.S. Reidenberg, S. Marquez, and P. J. Gannon. 1996. What the nose knows: New understandings of Neanderthal upper respiratory tract specializations. Proceedings of txe National Academy of Science USA 93: 10543-10545.
Ramirez, F. V., R. and J. Maria Bermudez de Castro. 2004. Surprisingly rapid growth in Neanderthals. Nature 428: 936-939 doi:10.1038/nature02428.
Holden, C. 1999. A New Look Into Neandertals' Noses. Science 285: 31-33.
Krings, M., A. Stone, R. W. Schmitz, H. Krainitzki, M. Stoneking, and S. Paabo. 1997. Neandertal DNA Sequences and the Origin of Modern Humans. Cell 90: 19-30.
Ovchinnikov, I.V., A. Gotherstrom, G. P. Romanovak, V. M. Kharitonov, K. Liden, and W. Goodwin. 2000. Molecular analysis of Neanderthal DNA from the northern Caucasus. Nature 404: 490-493.
Krings, M., C. Capelli, F. Tschentscher, H. Geisert, S. Meyer, A. von Haeseler, K. Grossschmidt, G. Possnert, M. Paunovic, and S. Pääbo. 2000. A view of Neandertal genetic diversity Nature Genetics 26: 144-146.
Schmitz, R. W., Serre, D., Bonani, G., Feine, S., Hillgruber, F., Krainitzki, H., Pääbo, S. & Smith, F. H. 2002.
The Neandertal type site revisited: Interdisciplinary investigations of skeletal remains from the Neander Valley, Germany. Proceedings of the National Academy of Science USA 99: 13342-13347
I assure you not a single one of those studies cited states Neanderthals and humans do not share a common ancestor;
For example, this article you cite...
Krings, M., A. Stone, R. W. Schmitz, H. Krainitzki, M. Stoneking, and S. Paabo. 1997. Neandertal DNA Sequences and the Origin of Modern Humans. Cell 90: 19-30.
Is the one that is the SOURCE of the estimate that the common ancestor of Neanderthals and humans was 500,000-700,000 years ago.
You're citing stuff that annihilates your argument. Hilarious.
Any author claiming these articles show there's no relationship between Neanderthals and humans is either too stupid to understand the articles, or deliberately lying.