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 ...
PNAS

Broadband topological transitions in twisted elastodynamic metasurfaces

We extend the concept of twistronics to elastodynamic metasurfaces with broken symmetries, unlocking exquisite control over phonon fields. Notably, we predict and experimentally demonstrate broadband, ...
PNAS

In This Issue

Fire corals (Millepora) are reef-building organisms with branching structures that provide habitat for a variety of marine life. For more than 30 years, fire corals have flourished on degraded ...
PNAS

Counterfeit judgments in large language models

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PNAS

A DISCUSSION AND PROPOSALS CONCERNING FOSSIL DINOFLAGELLATES, HYSTRICHOSPHERES, AND ACRITARCHS, I

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PNAS

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

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On the Anaphase Movement of Chromosomes

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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 ...
PNAS

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 ...
PNAS

Dux cluster duplication ensures full activation of totipotent genes

Among them, Dux has been considered as a master inducer for regulating ZGA process (3 – 5). Dux (also named as Duxf3) in mice and its human homolog DUX4 are double homeodomain genes activated during ...
PNAS

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 ...
PNAS

In This Issue

Meteorites provide important information about the formation of the Solar System and the distribution of solids and volatiles throughout it. However, meteorites that land on Earth display biases ...