On Mar. 3, 1863, to meet the government’s urgent need for an independent adviser on scientific matters, President Lincoln signed a congressional charter forming the National Academy of Sciences on Mar. 3, 1863 to “investigate, examine, experiment, and report upon any subject of science.”

As science began to play an ever-increasing role in national priorities and public life, the National Academy of Sciences eventually expanded to include the National Research Council in 1916, the National Academy of Engineering in 1964, and the Institute of Medicine in 1970.

Explore their flagship journal PNAS, reports from the National Academies, and other NAS publications. The Proceedings of the National Academy of Sciences (PNAS) is an authoritative source of high-impact, original research that broadly spans the biological, physical, and social sciences. The journal is global in scope and submission is open to all researchers worldwide.