Nominations for the 2026 Cozzarelli Prize are now open! Each year, six outstanding PNAS articles are honored for their significant contributions to their fields. Submit a nomination today: https://ow.ly/Zxym50ZWp08

Explore peer-reviewed research in demography from PNAS, including population dynamics, demographic transitions, and census methodologies. Discover articles that inform social policy, healthcare planning, and economic development: https://ow.ly/ySFI50ZWoh2

Opinion: Don’t tax the talent that builds American science. A #DHS rule could have lasting impacts on #GraduateStudents, #InternationalStudents, and US scientific competitiveness. In PNAS Front Matter: https://ow.ly/yypU50ZWnWB

#StudentVisa #ScienceEnterprise

Tree rings from long-lived bristlecone pines show that heat and drought don’t always go together in the Rocky Mountains. Thousands of years of data show that droughts have occurred under cool conditions almost as often as under warm conditions. In PNAS: https://ow.ly/8nrV50ZWmfL

PNAS has joined ResearchGate’s Journal Home, bringing full-text PNAS research to a global community of more than 25 million researchers and expanding opportunities for discovery and engagement. Learn more about the partnership: https://ow.ly/1WB350ZWpv5

In a recent PNAS Profile, we explore Shang-Ping Xie’s influential work showing that climate warming is occurring in the tropical Pacific Ocean but is masked by the ocean’s internal variability. Read more: https://ow.ly/qcrE50ZWnXf

Human brains shrink with age. Other great apes don’t show the same pattern, according to a study of the brains of chimpanzees, bonobos, gorillas, and orangutans. Human brain shrinkage may be associated with our comparatively long lifespan. In PNAS: https://ow.ly/j4zy50ZWpj2

The National Academy of Engineering Fall 2026 issue of The Bridge explores how engineering, medicine, and the life sciences are creating new possibilities for improving human health.

Explore the issue: https://ow.ly/ktGR50ZWpqJ

#Vaccine data suggest #immunity could mitigate #dementia. What’s the #biology behind these apparent effects? A PNAS Inner Workings: https://ow.ly/eHJj50ZWmR7

#shingles #RSV #diphtheria #tetanus #Alzheimers #ImmuneSystem #vaccination

Children ages 4–9 across six cultures around the world spontaneously helped one another with a puzzle, whether Wichí, Quechua, ≠Akhoe Hai||om, Samburu, Kikuyu, or German suggesting that helping their peers is universal among children. In PNAS: https://ow.ly/cOkG50ZWmmJ

Chondrules, solidified droplets from the early Solar System, have been found in the dust trail of a Jupiter-family comet, 81P/Wild 2. The chondrules may be from a previously unrecognized source—likely a remote, oxidized, and icy environment. In PNAS: https://ow.ly/kCAM50ZVXaK

One of the most-viewed PNAS articles in the last week is “Climate-amplified wildland–urban interface disasters create persistent internal metal mixtures associated with pulmonary impairment.” https://ow.ly/8iyZ50ZVXPe

For more trending articles, visit https://ow.ly/M59150ZVXP5.

In this issue: Metabolically favorable weight loss in mice, dual-phase gel organization of chromosomes, and the source of Shang Dynasty tin. In PNAS: https://ow.ly/I5Vv50ZVXtF

Cities can serve as refugia for plants as the climate changes, according to a satellite-based study that finds that vegetation has higher levels of resilience to climate stress in cities than in surrounding rural areas—mostly due to watering. In PNAS: https://ow.ly/F1M750ZVX7h

#Hedgehog #coronavirus poses little risk of jumping to humans, according to study results. In PNAS Journal Club: https://ow.ly/3gUY50ZVXnw

#COVID19 #SARSCoV2 #pandemic #cerbecovirus #betacoronavirus

Lung organoids exposed to cigarette smoke condensate developed an immune evasive state, and their stem cells evolved into premalignant states. Genetically susceptible organoids eventually developed tumors. In PNAS: https://ow.ly/z3zX50ZVXfz

One of the most-discussed PNAS articles on Reddit last month was “Generative AI without guardrails can harm learning: Evidence from high school mathematics.” Explore the article: https://ow.ly/6lBC50ZV5xz

One of the most-viewed PNAS articles in the last week is “Decoupling food insecurity from shocks: A global analysis of food system resilience.” Explore the article here: https://ow.ly/5L3S50ZV4Ke

For more trending articles, visit https://ow.ly/5FpW50ZV4Kg.

Sunflower season may be winding down, but their story goes back millions of years. 🌻

From the Science Sessions archive, explore how the sunflower family originated, diversified, and spread around the world.

🎧Listen now: https://ow.ly/XK6m50ZV5rT

Computational language analysis helps explain why the book Bushido: The Soul of Japan was so popular among Western audiences. The study sheds light on how cultural traditions can reach new societies without losing their core meanings. In PNAS Nexus: https://ow.ly/o3Qe50ZV5me