PNAS in the News

Sex differences in metabolic brain aging

Brain metabolism scans in individuals aged 20–82 years revealed that compared with male brains, female brains appeared three to four years younger on average, suggesting potential links between sex and human brain aging.

Image courtesy of Pixabay/geralt.

CNN ●  USA Today ●  PNAS Article

Organism mobility in the Paleoproterozoic Era

String-shaped pyritized structures preserved in shale from Gabon’s Franceville basin suggest that some organisms were capable of movement approximately 1.5 billion years earlier than thought and shed fresh light on the origin of multicellularity.

Image courtesy of Abderrazak El Albani.

Reuters ●  Newsweek ●  PNAS Article

Origin of European megaliths

Ancient megalith building likely originated in northwest France’s Brittany region and diffused via sea routes in three main phases, suggesting that the maritime skills and technology of megalithic societies may have been more advanced than previously thought.

Image courtesy of Bettina Schulz Paulsson.

NY Times ● Science ●  PNAS Article


Teaching Resources in PNAS

As a world-class multidisciplinary research journal, PNAS offers a wealth of content—from Core Concepts articles that explain a trending topic in a given field, to the ability to quickly download figures and tables for PowerPoint slides—that will enhance course curricula and encourage classroom discussion. These informative resources are collected here in the PNAS Teaching Resources Portal.


Mar 26, 2019
Canonical URL: Profile of Paul E. Olsen
Mar 04, 2019
Canonical URL: Profile of Eric Rignot
Feb 19, 2019
Canonical URL: Profile of Hao Wu
Jan 22, 2019


Pollution across borders
Daven Henze discusses how air pollution spreads across the globe and what policymakers are doing in response.