PNAS

Front Matter

Dive into PNAS Front Matter for editorials, interviews, science news, and commentary that offer expert perspective on today’s most important research findings.
PNAS

Marine upper-tropospheric rapid particle formation dominated by methanesulfonic acid

Contributed by Joseph S. Francisco; received February 25, 2026; accepted May 6, 2026; reviewed by Xinlei Ge and Roy M Harrison ...
PNAS

Strain-induced deterministic moiré superlattices in 2D materials

Since the discovery of superconductivity in twisted bilayer graphene in 2018, moiré superlattices have emerged as an important platform for controlling electronic states in two-dimensional (2D) ...
PNAS

Interfacial electric fields create hyperalkaline shells on fatty acid–coated microdroplet aerosols

We gratefully acknowledge the Department of Civil and Environmental Engineering at Virginia Tech for providing experimental support. This research was supported by the Sustainable Nanotechnology ...
PNAS

Remote sensing enables expansion of our understanding of controls on river width and active floodplain

I wish to gratefully thank the Editorial Board Member Mary Power for useful suggestions to improve the accessibility of this commentary for a general reader. K. Zhao et al., Variability in alluvial ...
PNAS

AI assists adversarial collaboration in debate on minority salience

Disputes are central to scientific progress, but their resolution can be difficult. Adversarial collaboration offers a powerful but underexplored method for addressing scientific debate. We offer ...
PNAS

Methane contamination of drinking water accompanying gas-well drilling and hydraulic fracturing

Edited* by William H. Schlesinger, Cary Institute of Ecosystem Studies, Millbrook, NY, and approved April 14, 2011 (received for review January 13, 2011) Map of drilling operations and well-water ...
PNAS

Optical edge detection based on high-efficiency dielectric metasurface

Edge detection is a fundamental tool in image processing, computing, and machine vision. Compared with digital processes, optical analog approaches show enormous advantages owing to its intrinsic ...
PNAS

Phonon softening and crystallographic orientation of strained graphene studied by Raman spectroscopy

We present a systematic study of the Raman spectra of optical phonons in graphene monolayers under tunable uniaxial tensile stress. Both the G and 2D bands exhibit significant red shifts. The G band ...
PNAS

No reason to expect large and consistent effects of nudge interventions

As policy makers are increasingly interested in implementing nudge-type interventions, it is essential that we understand under what conditions they can improve policy-relevant outcomes to make the ...
PNAS

Mastering the interface for advanced all-solid-state lithium rechargeable batteries

Contributed by John B. Goodenough, September 30, 2016 (sent for review August 24, 2016; reviewed by Ken Poeppelmeier and Jean-Marie Tarascon) ...
PNAS

On the mechanisms of conjugate vaccines

Fortunately, this deficiency can be overcome when polysaccharides are covalently conjugated to carrier proteins, because in this case, the B cells that recognize the polysaccharide on FDCs retrieve ...