Proceedings of the National Academy of Sciences (PNAS)

Earliest evidence of smoke-dried mummification: More than 10,000 years ago in southern China and Southeast Asia

This finding documents smoke-dried mummification of the dead, mostly in tightly bound crouched postures, from archaeological ...
PNAS

Remembrance of phytoplankton’s past

Remembrance of phytoplankton’s pastNote: 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 ...
PNAS

The Inheritance of a Retinal Abnormality in White Mice

This paper is a preliminary report of an investigation dealing with the inheritance of a retinal abnormality in white mice. The problem was undertaken at the suggestion of Dr. S. R. Detwiler who has ...
PNAS

Predicting regime shifts and beyond

Predicting regime shifts and beyondNote: 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 ...
PNAS

Editorial Expression of Concern for Poon et al., Targeting the muscarinic M1 receptor with a selective, brain-penetrant antagonist to promote remyelination in multiple sclerosis

The editors note that the PNAS Editorial and Journal Policies stipulate that authors must provide sufficient information to establish the identity of a new compound and its purity, must include ...
PNAS

Reply to Ju et al.: Mechanisms of deeper soil organic carbon loss

In the accompanying comment, Ju et al. (1) supports the deeper soil organic carbon (SOC) loss from our continental-scale soil resampling study (2). Importantly, we greatly appreciate their novel ...
PNAS

Associative learning in the cnidarian Nematostella vectensis

Cnidaria, the sister group of Bilateria, include corals, jellyfish, and sea anemones. They possess neurons, which are organized in a diffuse nerve net. It is generally agreed that cnidarian and ...
PNAS

How “forever chemicals” might impair the immune system

Animal models and human studies suggest that forever chemicals, delivered through water, food, and air, alter the immune system, potentially diminishing our ability to fight disease or respond to a ...
PNAS

What models can and cannot tell us about COVID-19

The coronavirus disease 2019 (COVID-19) pandemic, caused by the novel coronavirus severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2), has already claimed more than 470,000 deaths worldwide ...
PNAS

Wind farm power optimization through wake steering

Edited by Alexis T. Bell, University of California, Berkeley, CA, and approved May 20, 2019 (received for review March 4, 2019) While the major reason for decreased wind farm efficiency is variability ...
PNAS

Optical edge detection based on high-efficiency dielectric metasurface

Edge detection is a fundamental tool in image processing, computing, and machine vision. Compared with digital processes, optical analog approaches show enormous advantages owing to its intrinsic ...
PNAS

Mass spider silk production through targeted gene replacement in Bombyx mori

The use of heterologous systems to express spider silk has become an attractive method. However, achieving cost-effective production and high yields is still challenging. Here, we describe the ...