In this issue: Heat-driven decline of Caribbean corals, colonial influence on Amazonian forests, and evidence that repaired DNA leaves lasting scars in chromatin. In PNAS: https://t.co/ioPmx1SChZ

Some cattle don’t do well in the heat. A new genomic approach improves the accuracy of predicting heat tolerance in cattle by up to 11%, which could help farmers breed animals better adapted to rising global temperatures. In PNAS: https://t.co/xqOauGVqkg

Honor exceptional science! If a PNAS paper this year advanced its field, submit a Cozzarelli Prize nomination by Jan 2, 2026. Eligible articles were published between Dec 16, 2024–Dec 15, 2025. Nominate today: https://t.co/51407yIexF

A collection of articles from The Genetics of Canine Domestication, Migration, and Behavior Special Feature highlights research on the evolutionary history of dogs and the genetic basis of dog behavior. In PNAS: https://t.co/sEUB08zCsd

Poor air quality doesn’t just affect humans—it impacts pets too. Stephen Jarvis of @LSEnews and colleagues link bad-air days to increased veterinary visits for cats and dogs, revealing another cost of pollution. Listen now: https://t.co/RToSZu1Or6

The Chandler Wobble is not a dance craze, but a small deviation in the Earth’s rotation. A newly identified six-year cycle in Earth's annual polar motion appears to drive the mysterious Chandler Wobble, confirming an 85-year-old hypothesis. In PNAS: https://t.co/OJKWVLdILQ

Read highlights in this week’s issue of PNAS: We explore plant litter and ecosystem carbon flux, analyze early evidence of symbolic art, and examine how Caribbean’s resilient corals are succumbing to heat. In PNAS: https://t.co/2hTzLmuKuZ

Samples from the asteroid Bennu include all five RNA and DNA bases and 14 amino acids, including tryptophan, indicating the range of prebiotic organic molecules that could have been delivered via impacts to the early Earth—and other planets. In PNAS: https://t.co/FC2xnigjaO

Data from 10,000+ necropsies show how macroplastic ingestion drives mortality in marine species. For seabirds, mammals, and turtles, 6–405 pieces can raise risk to 90%, depending on species and plastic type. In @NPR: https://t.co/LcW048PbY0 In PNAS: https://t.co/Drl3C5Ahl4

The Roman Empire needed wood for building and burning. Tree-ring analysis of over 20,000 samples reveals how Roman expansion drove intensive logging across Central-Western Europe, eventually leading to overexploitation of old-growth forests. In PNAS: https://t.co/a6u99yS1Ob

Opinion piece: Despite what some suggest, removing #DeadTrees will not save us from fast-moving #wildfires. In PNAS Front Matter: https://t.co/vTeB5HpEaq #logging #ClimateChange #ForestFire

People born during China's Great Famine, from 1958 to 1962, show a 13% higher risk of infectious diseases in adulthood, with smaller effects extending to their children, highlighting the multigenerational impact of prenatal malnutrition. In PNAS: https://t.co/UeVJh8ZjMU

One of the most-viewed PNAS articles in the last week is “The potential existential threat of large language models to online survey research.” Explore the article here: https://t.co/8TRDhSmH87 For more trending articles, visit https://t.co/U7Q0QHI3OY.

Teaching people how mRNA vaccines actually work protects against misconceptions about mRNA vaccination changing the recipient's DNA, without the need to repeat the false claims, according to experiments with over 3,500 participants. In PNAS: https://t.co/P72O6ZXa94

Opinion piece: Catastrophic #wildfires are destabilizing the #InsuranceIndustry, leaving some homeowners in jeopardy. Here’s a path forward: https://t.co/49FfJQkOAa #BuiltEnvironment #RiskAssessment #ClimateChange #LandManagement

Honor exceptional science! If a PNAS paper this year advanced its field, submit a Cozzarelli Prize nomination by Jan 2, 2026. Eligible articles were published between Dec 16, 2024–Dec 15, 2025. Nominate today: https://t.co/6aVrC93fAA

Mars lacks Earth-like tectonics, but its ancient river systems reveal that about 5% of the planet is covered by large drainage networks—forming a mosaic of potentially habitable environments across its surface. In PNAS: https://t.co/BWrUtfFWlr

One of the most-viewed PNAS articles in the last week is “Organic geochemical evidence for life in Archean rocks identified by pyrolysis–GC–MS and supervised machine learning.” Explore now: https://t.co/SosoitWIwn For more trending articles, visit https://t.co/PEjpsGF9VM

Six years of monitoring in a warmed forest showed a decrease in nitrogen emissions due to reduced microbial activity in dry soil. The result was contrary to predictions and challenges ecosystem model assumptions. In PNAS: https://t.co/ERPgROIqOX

All hail Caenorhabditis elegans, one of the most researched organisms on Earth. Collaborative data sharing in the nematode research community led to four Nobel Prize-winning discoveries about human development and disease. In PNAS: https://t.co/jLTwiXcXWC