Proceedings of the National Academy of Sciences (PNAS)

Table Of Contents Page, PNAS Volume 122, Number 49

NASA’s OSIRIS-REx mission characterized the asteroid Bennu and delivered pristine samples of its regolith to Earth. Coordinated analyses of this primitive, carbonaceous material are elucidating the ...
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Counterfeit judgments in large language models

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COMPETITION, HABITAT SELECTION, AND CHARACTER DISPLACEMENT IN A PATCHY ENVIRONMENT

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On the Anaphase Movement of Chromosomes

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Publication Charges

PNAS depends, in part, on the payment of article processing charges (APCs) to finance its operations. Papers are accepted or rejected for publication and published solely on the basis of merit. For ...
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Mechanism of action of penicillins: a proposal based on their structural similarity to acyl-D-alanyl-D-alanine.

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ACETYLATION AND METHYLATION OF HISTONES AND THEIR POSSIBLE ROLE IN THE REGULATION OF RNA SYNTHESIS

Teasing out biochemical information from ancient organic-rich sediments, notably the timing of the emergence of photosynthesis relative to the inferred oxygenation of Earth’s atmosphere, remains a ...
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COMPARISON OF POPULATION ENERGY FLOW OF A HERBIVOROUS AND A DEPOSIT-FEEDING INVERTEBRATE IN A SALT MARSH ECOSYSTEM

We explore the key differences between the main social media platforms and how they are likely to influence information spreading and the formation of echo chambers. To assess the different dynamics, ...
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The ergodicity question when imaging DNA conformation using liquid cell electron microscopy

Assessing the ergodicity of graphene liquid cell electron microscope measurements, we report that loop states of circular DNA interconvert reversibly and that loop numbers follow the Boltzmann ...
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Sustainable separation of rare earth elements from wastes

Our study presents a flash Joule heating (FJH) combined with chlorination (FJH-Cl 2) as an efficient method for rare earth elements (REE) separation and recovery from electronic waste. FJH-Cl 2 ...
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In This Issue

Starosele rock shelter in the Crimean Peninsula. Image credit: Serhii Telizhenko (National Academy of Sciences of Ukraine, Kyiv, Ukraine). The Crimean Peninsula is hypothesized to have been a refuge ...