Proceedings of the National Academy of Sciences, Volume 123, Issue 42, October 2026. SignificanceMost autotrophic bacteria rely on CO2-concentrating mechanisms (CCMs) to overcome the slow...
Proceedings of the National Academy of Sciences, Volume 123, Issue 42, October 2026. SignificanceThe axon initial segment is a specialized neuronal compartment hosting a molecular...
Proceedings of the National Academy of Sciences, Volume 123, Issue 42, October 2026. SignificanceMore than one billion people live in urban informal settlements, and this...
Proceedings of the National Academy of Sciences, Volume 123, Issue 42, October 2026. SignificanceCognitive flexibility, the ability to update behavior when circumstances change, depends on...
Print article Share Artificial intelligence (AI) is developing at a rapid pace and is increasingly being used by scientists to better understand climate change. AI...
Abstract The carbon dioxide (CO2)/argon (Ar) ratio is a useful tracer of atmospheric circulation on Mars, but it remains observationally poorly constrained in the middle...
Proceedings of the National Academy of Sciences, Volume 123, Issue 42, October 2026. SignificanceCapturing enzymes under native conditions is a ‘holy grail’ of structural biology,...
Proceedings of the National Academy of Sciences, Volume 123, Issue 42, October 2026. SignificanceCells need cytidine triphosphate (CTP) to build RNA, yet how its sole...
Abstract Rapid infiltration influences rainfall partitioning, subsurface water movement, and freshwater availability, yet its large‐scale spatial organization remains poorly constrained by limited observations and the...
Protesters at World Bank and IMF meetings, along with new research, are railing against a globalized system that fails to produce enough food and has...
Abstract Seasonal prediction of surface climate relies on influences external to the troposphere, of which the stratosphere is a key source. The October stratosphere is...
What does going on a date have to do with fossil fuels? Everything, according to the petroleum industry. One advertisement from the pipeline company Energy...
Abstract Predicting the response of Antarctic ice to climate change requires detailed knowledge of its shallow structure, but direct measurements are challenging. Traditional seismic surveys...
War-induced spikes in oil prices and the arrival of artificial intelligence are widening the economic gap between rich and poor countries, according to the International...
Proceedings of the National Academy of Sciences, Volume 123, Issue 42, October 2026. SignificanceSocial play is considered critical for developing social, cognitive, and physical skills...
Proceedings of the National Academy of Sciences, Volume 123, Issue 42, October 2026. SignificanceThis study provides ancient DNA analysis of Québec’s French-Canadian founder population from...
After decades of losses, mangrove trees are gaining ground on coastlines around the world, often in places they have never grown before. But evidence suggests...
Proceedings of the National Academy of Sciences, Volume 123, Issue 42, October 2026. SignificanceThe epithelial–mesenchymal transition (EMT) enables cells to migrate during development and is...
Proceedings of the National Academy of Sciences, Volume 123, Issue 42, October 2026. SignificanceWe delineate how chronic inflammation induced by smoking drives evolution of different...
A version of this article was published in Euronews and ClimaticaAcross Brittany, tractors can be seen trundling onto beaches to remove truckloads of foul-smelling algae...