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 ...

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 ...

Did it all begin with hydrogen cyanide?

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 ...

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 ...

Journal Club posts are short news stories featuring a recent important, timely journal article selected by one of our Journal Club panelists, who are post-doctoral associates and graduate students in ...

Note: 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 following publication. Citation ...

Note: 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 following publication. Citation ...

The complete amino acid sequence of a human γG1 immunoglobulin (Eu) has been determined and the arrangement of all of the disulfide bonds has been established. Comparison of the sequence with that of ...

Dive into PNAS Front Matter for editorials, interviews, science news, and commentary that offer expert perspective on today’s most important research findings.

On the Rate of Growth of the Population of the United States since 1790 and Its Mathematical Representation1 ...

Contributed by James Tiedje; received April 23, 2025; accepted January 26, 2026; reviewed by Gwyn A. Beattie and Corné M. Pieterse Soilborne diseases pose a significant threat to plant health, often ...