Social wound care plays a life-saving role in taxa as diverse as primates, ungulates, and insects. Yet the organizational principles that underlie this behavior remain unknown. In eusocial animals ...
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 ...
The goal of science is the generation of knowledge to advance human understanding of the world and our place in it, while also helping to solve global problems. This ideal transcends nationality, ...
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 ...
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 ...
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 ...
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) ...
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 ...
This work was supported by the National Key Research and Development Program of China, Grant 2021YFA1300402 (to P.W.), the National Natural Science Foundation of China, Grant 32561143032 (to P.W.), ...
Fungal proliferation in geologic samples can signify major ecosystem disruptions. Such spikes are documented globally for the Permian-Triassic extinction but for the Cretaceous–Paleogene extinction ...
The Koobi Fora Formation preserves a rich Plio-Pleistocene record of hominins, fauna, and environments, providing a cornerstone for understanding human evolution. Nearly all zooarchaeological evidence ...
Did it all begin with hydrogen cyanide? A. M. Nauth et al., Synthesis of α-aminonitriles using aliphatic nitriles, α-amino acids, and hexacyanoferrate as universally applicable non-toxic cyanide ...
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