The Proceedings of the National Academy of Sciences of the United States of America, usually referred to as PNAS, is the official journal of the United States National Academy of Sciences (NAS). PNAS is an important scientific journal that printed its first issue in 1915 and continues to publish highly cited research reports, commentaries, reviews, perspectives, feature articles, profiles, letters to the editor, and actions of the Academy. Coverage in PNAS broadly spans the biological, physical, and social sciences. Although most of the papers published in the journal are in the biomedical sciences, PNAS recruits papers and publishes special features in the physical and social sciences and in mathematics. PNAS is published weekly in print, and daily online in PNAS Early Edition. PNAS was established by NAS in 1914, with its first issue published in 1915. The NAS itself had been founded in 1863 as a private institution, but chartered by the US Congress, with the goal to "investigate, examine, experiment, and report upon any subject of science or art." By 1914, the Academy was well established.
New research explores how culture affects our conceptions of nature
Do we think of nature as something that we enjoy when we visit a national park and something we need to "preserve?" Or do we think of ourselves as a part of nature? A bird's nest is a part of nature, but what about a house?
Researchers find possible explanation of early Polynesian migration
Physicists develop miniature Raman laser sensors for single nanoparticle detection
Optical sensing of nanoscale objects with ultrahigh sensitivity is highly desirable for applications in various fields, such as in early-stage diagnosis of human diseases and in environmental monitoring, ...
Bats may be mistaking wind turbines for trees
Certain bats may be approaching wind turbines after mistaking them for trees, according to a study to be published in the Proceedings of the National Academy of Sciences.
Tree killers, yes, fire starters, no: Mountain pine beetles get a bad rap, study says
Mountain pine beetles get a bad rap, and understandably so. The grain-of-rice-sized insects are responsible for killing pine trees over tens of millions of acres in the Western U.S. and Canada over the last ...
At the interface of math and science
In popular culture, mathematics is often deemed inaccessible or esoteric. Yet in the modern world, it plays an ever more important role in our daily lives and a decisive role in the discovery and development ...
Recessions result in lower birth rates in the long run
While it is largely understood that birth rates plummet when unemployment rates soar, the long-term effects have never been clear. Now, new research from Princeton University's Woodrow Wilson School of Public ...
No need for extrasolar delivery by comet: Nitrogen fingerprint in biomolecules could be from early Sun
Chemical fingerprints of the element nitrogen vary by extremes in materials from the molecules of life to the solar wind to interstellar dust. Ideas for how this great variety came about have included alien ...
Research shows viral DNA infects cells by changing from solid to fluid-like state
Many double-stranded DNA viruses infect cells by ejecting their genetic information into a host cell. But how does the usually rigid DNA packaged inside a virus' shell flow from the virus to the cell?
Simulation technology designed for Hollywood can be used as predictive tool for understanding fundamental engineering
When one sends an email from Boston to Beijing, it travels through submarine optical cables that someone had to install at some point. The positioning of these cables can generate intriguing coiling patterns that can also ...
Now hear this: Simple fluid waveguide performs spectral analysis in a manner similar to the cochlea
Land policy changes would sequester more carbon and conserve habitat
Rewarding landowners for converting farmland into forest will be key to sequestering carbon and providing wildlife habitat, according to a new study by Oregon State University and collaborators.
Engineers combine mechanics with biology to make key discovery about communication between cells
When the body forms new tissues during the healing process, cells must be able to communicate with each other. For years, scientists believed this communication happened primarily through chemical signaling. Now researchers ...
Search for better biofuels microbes leads to the human gut
Scientists have scoured cow rumens and termite guts for microbes that can efficiently break down plant cell walls for the production of next-generation biofuels, but some of the best microbial candidates ...
Could suburban sprawl be good for segregation? Low-density neighborhoods more likely to stay integrated
Racially and economically mixed cities are more likely to stay integrated if the density of households stays low, finds a new analysis of a now-famous model of segregation.