Singlet oxygen (1 O 2) drives key photochemical reactions in the atmosphere and natural waters, yet its spatial distribution in multiphase systems remains unexplored. Here, we reveal strong microscale ...

As these chemicals swirl down drains, or leach out of trash at the dump, they contaminate soil, groundwater, and, ultimately, ...

Haplodiploidy and the evolution of eusociality: A long-standing question is finally resolved ...

We examine i) whether the public views AI as labor-replacing rather than labor-creating, and ii) how these perceptions affect two core democratic outcomes: democratic legitimacy (e.g., satisfaction ...

Signals and the shape of developmental landscapes Join the global community of subscribers to PNAS, the flagship journal of the US National Academy of Sciences, a mission-driven nonprofit society.

Edited by Huijie Zheng, Chinese Academy of Sciences Institute of Physics, Beijing, China; received November 18, 2024; accepted May 31, 2025, by Editorial Board Member Chris Jarzynski ...

In the spring of 2022, the Calf Canyon/Hermit’s Creek fire burned over 300,000 acres in New Mexico (1), including terrain near the Rio Gallinas School for Ecology and the Arts in Las Vegas, New Mexico ...

Contributed by John B. Goodenough, September 30, 2016 (sent for review August 24, 2016; reviewed by Ken Poeppelmeier and Jean-Marie Tarascon) ...

All known 4-manifolds invariants cannot distinguish a possible counterexample to the smooth 4-dimensional Poincare Conjecture from the standard 4-sphere. The L invariant, defined in this paper, can do ...

As the last great ice sheets were retreating and the Pleistocene Epoch was ending, humanity began an epic journey. For hundreds of thousands of years, our ancestors had survived by hunting animals and ...

In March 1835, a young Charles Darwin was high up in the Andes and struggling to cook supper. “Our potatoes after remaining for some considerable time in the boiling water were nearly as hard as ever, ...

The role of social media in political discourse has been the topic of intense scholarly and public debate. Politicians and commentators from all sides allege that Twitter’s algorithms amplify their ...