Since 2002, PNAS has offered free and immediate access to journal content for researchers in an initial group of 81 countries, a number that has grown to over 120 lower-income countries. This access ...

A study combining remote sensing and administrative data finds that since the mid-20th century, large, growing cities have ceased to be centers of upward social and economic mobility.

Cable bacteria (Desulfaobulbaceae) are known for their ability to conduct electricity in the form of negatively charged electrons over many millimeters. To determine whether cable bacteria can also ...

High-resolution measurement of Roman-era lead pollution in Arctic ice cores at the Desert Research Institute. Image credit: Jessi LeMay (Desert Research Institute, Reno, Nevada). Atmospheric lead ...

PDV1 was thought to work corporately with PDV2 to recruit ARC5 to the chloroplast division site in the cytosol. However, we found that the major role of PDV1 is to interact with and regulate the ...

The Professional Nurse Advocate (PNA) programme delivers training and restorative supervision for colleagues right across England. The programme launched in March 2021, towards the end of the third ...