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

Singlet oxygen (1 O 2) drives key photochemical reactions in the atmosphere and natural waters, yet its spatial distribution in multiphase systems remains unexplored. Here, we reveal strong microscale ...

Ultrathin films of widely different materials exhibit a dramatic enhancement of projectile penetration resistance under high–velocity impact. Despite extensive simulations and experiments, a unifying ...

PNAS is among the many journals that have adopted data sharing policies, (1) with the goal of “promoting transparency, reproducibility, and accountability in research.” However, PNAS editors recently ...

Multilayer graphene moiré systems have revealed rich correlated and topological quantum phases, yet twisted transition metal dichalcogenides have been studied mainly as bilayer. Here we show that ...

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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 ...

Nitrogen cycling regulates ecosystem productivity and carbon storage, yet its global responses, mechanisms, and future trajectories under climate warming remain poorly understood. By integrating 7,941 ...

The Democracy Index finding holds up best. Its negative direct effect on offensive VEI (we use β for SDM coefficients throughout) survives spatial adjustment in every bivariate specification (Table 1) ...

Join the global community of subscribers to PNAS, the flagship journal of the US National Academy of Sciences, a mission-driven nonprofit society. PNAS is one of the world's most-cited scientific ...

A Science Strategy for Human Exploration of Mars (1), charts a bold, scientifically based blueprint for humanity’s greatest cosmic adventure—sending explorers to Mars to answer the universe’s most ...

Open in Viewer Climatic configuration of the western European margin mid-latitudes during the MIS 5a/4 transition. (Top) Global and Greenland paleoclimatic records compared to the sea surface ...