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.
A pair of researchers, one with the Paris School of Economics, the other with CNRS, UMR8545, Paris-Jourdan Sciences-Economiques, has found a possible reason for the gender gap in math fields—girls have an advantage in reading. ...
In the 1960s, Penn biologist Dan Janzen, as part of earning his Ph.D., re-described what has become a classic example of biological mutualism: the obligate relationship between acacia-ants and ant-acacia trees. The acacia ...
Plants & Animals
Jul 17, 2019
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85
Think of the most radioactive landscapes on the planet and the names Chernobyl and Fukushima may come to mind.
Environment
Jul 16, 2019
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315
Researchers at CSIRO, Australia's national science agency, have painstakingly reconstructed the nation's 'once in a century drought' in the early 1900s, revealing that it caused mass ecosystem collapse and dramatic declines ...
Environment
Jul 16, 2019
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219
Why did you choose your job? Or where you live? Scientists at the University of Warwick have discovered that it was probably to keep your options as open as possible—and the more we co-operate together, the more opportunities ...
Plants & Animals
Jul 16, 2019
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331
A new collaborative study, led by the Natural History Museum and the Max Planck Institute for Evolutionary Anthropology, has extracted ancient DNA from the Neanderthal fossils of Gibraltar for the first time. The new study ...
Archaeology & Fossils
Jul 16, 2019
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1703
A team of researchers from Columbia University has found that radiation levels from atomic testing in the Marshall Islands are still too high for human habitation. In their paper published in Proceedings of the National Academy ...
Flourishing in spectacular numbers in lakes and ponds around the world, tiny creatures known as Daphnia play an essential role in freshwater ecology. Daphnia, a type of planktonic crustacean, are the primary consumers of ...
Ecology
Jul 15, 2019
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100
There's the old saying that you should never discuss politics or religion in polite company. Nowadays, it seems climate change has joined that list.
Environment
Jul 15, 2019
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38
Bacterial ribosomes need a single-stranded ribosome binding site (RBS) to initiate protein synthesis, whereas stable RNA structure blocks initiation. Paradoxically, structured mRNAs can nevertheless be efficiently translated. ...
Cell & Microbiology
Jul 15, 2019
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179
