View the Table of Contents for Volume 123, Issue 22 ...
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 ...
It’s increasingly hard to find peer reviewers. To address the problem, we propose a universal peer-review system based on the exchange of credits. Image credit: Dave Cutler (artist). Several factors ...
The ordered arrangement of mechanosensory hair cells in vertebrate auditory epithelia relies on mechanical interactions among multiple cell types. Yet, how local mechanical heterogeneity produces ...
In the PNAS of March 4, 2026, Lynne Peeples presented a news feature on the “science behind acupuncture” (1). We find this article unbalanced. It lacks a critical analysis of what acupuncture is and ...
Exercise works—if mitochondria do E. García-Domínguez et al., Mitochondrial remodeling in skeletal muscle underlies exercise-induced reversal of age-associated functional decline in mice and humans.
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 ...
Insects were the first organisms to evolve flight and have since become the most abundant species on Earth. However, the lack of well-defined flight traits and predictive theory has made it difficult ...
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 ...
We thank Dr. Haiteng Deng and all lab members for discussion and technical help. We thank Dr. Isabel Hanson for editing. This work was supported by Grants from the National Natural Science Foundation ...
Models of migration of brown bears after the last ice age into the newly deglaciated Scandinavia suggest two colonizing populations: southern bears from mitochondrial clade 1a and northern bears from ...
A technique is described for forming molecular hybrids between RNA in solution and the DNA of intact cytological preparations. Cells in a conventional tissue squash are immobilized under a thin layer ...
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