Why is it that some people, who are exceptional cases, can live 100 years of disease-free life while the vast majority of their contemporaries die from cancer, heart disease or stroke 20-30 years earlier? This is perhaps the most important question which the medical sciences should be tackling today, rather than the questions which currently dominant the "disease model" approach to ...

... , nine species taxonomy advocated in this study. doi/10.1073/pnas.0906660106 The data from ancient mitochondrial DNA also allowed the team ... new paleogeographic model of Neogene New Zealand. doi/10.1073/pnas.0906660106 NB the authors caution that the timings of divergence for the ... New Zealand Neogene paleogeography Proceedings of the National Academy of Sciences DOI: 10.1073/pnas.0906660106  

... , giving rise to immense new insights into the understanding of perception and attention. (PNAS, Online Early Edition, November 2nd, 2009) < ... Times New Roman","serif"">PNAS<span style="font-size:12.0pt; ... ;>, Online Early Edition, November 2, 2009 www.pnas.org/cgi/doi/10.1073/pnas.0903680106 <span style="font-size:12.0pt;font-family:"Times ...

... in a more natural way. It was developed at the Max Planck Institute for Biological Cybernetics in Tübingen, Germany.         Visually evoked activity in cortical cells imaged in freely moving animals Proceedings of the National Academy of Sciences, DOI: 10.1073/pnas.0903680106     Find the right PC with Windows 7 and Windows Live. Learn more.

... make it unpopular with the locals. (Credit: Peter Grant/PNAS, Source here) The Grants have observed a clustering of male territories of ... "a real-time record of evolution in action. In the PNAS paper, they describe something Darwin could only have dreamed of watching: the birth ... , Nov. 16, 2009 | doi 10.1073/pnas.0911761106 Abstract: Speciation, the process by which two species form from ...

... change could increase the likelihood of civil war in sub-Saharan Africa by over 50% within the next two decades, according to a new study led by a team of researchers at Stanford University, the University of California-Berkeley, New York University and Harvard University. The study is to be published online this week by the Proceedings of the National Academy of Sciences (PNAS). read more