Hamiltonian Systems and Transformation in Hilbert Space ...

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 ...

NAS members may contribute up to two research manuscripts annually, which must be within the member’s area of expertise and in which the member had a direct, significant role in the design and ...

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 ...

Cyclic Reduced Powers of Cohomology Classes Note: The article usage is presented with a three- to four-day delay and will update daily once available. Due to ths delay, usage data will not appear ...

GetFTR (Get Full Text Research) is a technology that streamlines access to scholarly resources by checking reader access permissions across a growing list of discovery platforms. Links are displayed ...

In memoriam of Anna Badia and Joan Lluvich. Aspects of Fig. 1 were produced using BioRender under full license (VU29SRR2RM). All the graphical material was originally made by O.P. G. Piovesan et al., ...

Edited by Joaquin Rodriquez-Lopez, University of Illinois Urbana-Champaign, Urbana, IL; received November 1, 2025; accepted May 5, 2026 by Editorial Board Member Marcetta Y. Darensbourg ...

The Proceedings of the National Academy of Sciences (PNAS) and its open access sibling journal PNAS Nexus, are both nonprofit mission-driven journals published by the National Academy of Sciences (NAS ...

HELIX FORMATION BY GUANYLIC ACID Note: The article usage is presented with a three- to four-day delay and will update daily once available. Due to ths delay, usage data will not appear immediately ...

Uma Shaanker (1) raises concerns regarding: a) sampling bias, b) paternity data, c) mating systems, d) phylogenetic analyses, and e) explanations underlying single paternity.

True-color Sentinel-2 satellite images of the Taklamakan Desert from June to August 2025. The green areas are vegetation, including both natural and planted vegetation. These areas are in the ...