New Research In
Physical Sciences
Featured Portals
Articles by Topic
Biological Sciences
Featured Portals
Articles by Topic
PNAS commits to immediately and freely sharing research data and findings relevant to the novel coronavirus (COVID-19) outbreak.
See the free collection of PNAS coronavirus papers and learn more about our response to COVID-19.
See the free collection of PNAS coronavirus papers and learn more about our response to COVID-19.
Front Matter
Recent experiments and simulations are starting to answer some fundamental questions about how life came to be.
Image credit: Shutterstock/Radoslaw Lecyk.
Archaeologists have long tried to define the transition between the two time periods.
Image credit: Ceri Shipton.
Researchers are exploring whether these ubiquitous fluorinated molecules might worsen infections or hamper vaccine effectiveness.
Image credit: Shutterstock/Dmitry Naumov.
In the News
A study finds that giant pandas roll in horse manure to increase their cold tolerance.
Image credit: Fuwen Wei.
Researchers report evidence of exotic foods in the Near East from the 2nd millennium BCE, suggesting trade networks with South Asia.
Image credit: The Meggido Expedition.
A collection of studies documents patterns of insect decline, raising concerns about insects’ future in a world altered by human activities.
Image credit: Pixabay/winterseitler.
Sign up for Article Alerts
Science Sessions Podcasts
Jonathon Yuly, David Beratan, and Peng Zhang investigate how electron bifurcation reactions work.
Featured Profile
Profile of NAS member and geneticist Haig Kazazian Jr.
Image credit: Courtney J. Barbour.
