ABOUT PNAS

One of the world's most-cited multidisciplinary scientific serials, the Proceedings of the National Academy of Sciences publishes cutting-edge research reports, commentaries, reviews, perspectives, and colloquium papers spanning the biological, physical, and social sciences. The journal is published daily and in weekly issues. Access to the current content is available by subscription, but free and immediately access is available to readers in more than 120 countries in the developing world. All content is freely available within six months of publication.

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