The sustainable aviation challenge is attracting plenty of investment and brainpower—as well as government policies aiming to incentivize development. But the innovations coming out of these efforts ...

Edited by Joseph Kieber, The University of North Carolina at Chapel Hill, Chapel Hill, NC; received November 27, 2024; accepted January 7, 2025 ...

A yellow-breasted capuchin nut-cracking site, with the remains of the used hammerstone and resulting sharp-edged flakes and fragments atop a large stone anvil. The development of stone tools, ...

Founded in 1914, PNAS publishes some of the world’s highest-quality and most significant research. Every paper at PNAS is handled by a member of the National Academy of Sciences, a nonprofit ...

Coronal brain slice showing projections from different visual areas in the cerebral cortex to the ventrolateral geniculate nucleus (vLGN). These pathways are part of the circuit thought to mediate the ...

Visiting professor of chemistry, Cornell University, 1957-58. Research carried out at Brookhaven National Laboratory under the auspices of the U.S. Atomic Energy Commission. Note: The article usage is ...

Edited by Anne C. Hart, Brown University, Providence, RI; received August 29, 2024; accepted December 19, 2024 by Editorial Board Member Yishi Jin Taken together, these results identify VHL-1 as a ...

Maria Iandolo New, who passed away on July 26, 2024, at the age of 95, was the child of Italian immigrants who came to America as professional musicians. She grew up in the Little Italy section of ...

Long before the election cycles of 2024, 2020, or even 2016, anyone who followed US political news could sense it—a toxic, ever-escalating tide of alienation, suspicion, and loathing for the opposing ...

Some historically persecuted large carnivore species in Europe and North America are now recovering and expanding into formerly occupied ranges. The spatial and temporal dynamics of wildlife ...

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 ...

Since the turn of the 21st century, rapid advancements in phylogenomics have significantly deepened our understanding of the tree of life, particularly for ancient divergence. A recent letter to the ...