Proceedings of the National Academy of Sciences
Articles in this Issue
Structural determinants of oxygen resistance and Zn <sup>2+</sup> -mediated stability of the [FeFe]-hydrogenase from <i>Clostridium beijerinckii</i>
[FeFe]-hydrogenases catalyze the reversible two-electron reduction of two protons to molecular hydrogen. Although these enzymes are among the most efficient H 2...
Correction for Tveit et al., Widespread soil bacterium that oxidizes atmospheric methane
Burrow collapse is not the only explanation for rapid, noncatastrophic preservation of 3D dinosaurs
Correction for van de Water et al., Therapeutic stem cells expressing variants of EGFR-specific nanobodies have antitumor effects
Reply to Emery-Wetherell: Taphonomy of Lujiatun 3D dinosaurs is inconsistent with death and burial by lahars
Starch-rich plant foods 780,000 y ago: Evidence from Acheulian percussive stone tools
In contrast to animal foods, wild plants often require long, multistep processing techniques that involve significant cognitive skills and advanced toolkits to perform. These costs are thought to have...
High organofluorine concentrations in municipal wastewater affect downstream drinking water supplies for millions of Americans
Wastewater receives per- and polyfluoroalkyl substances (PFAS) from diverse consumer and industrial sources, and discharges are known to be a concern for drinking water quality. The PFAS family includ...
Olfaction with legs—Spiders use wall-pore sensilla for pheromone detection
The sense of smell is a central sensory modality of most terrestrial species. However, our knowledge of olfaction is based on vertebrates and insects. In contrast, little is known about the chemosenso...
Pan-European atmospheric lead pollution, enhanced blood lead levels, and cognitive decline from Roman-era mining and smelting
Ancient texts and archaeological evidence indicate substantial lead exposure during antiquity that potentially impacted human health. Although lead exposure routes were many and included the use of gl...