PNAS

Conodont fossils contain data on the Kasimovian–Gzhelian Thermal Maximum, a global temperature rise of about 7.5 °C some 304 million years ago. The event was likely triggered by a modest carbon release that crossed a tipping point. In PNAS: https://ow.ly/rcjx50ZzttC

One of the most-viewed PNAS articles in the last week is “The evolution of the Earth’s surface iron cycle.” Explore the article here: https://ow.ly/wy5950ZztQ7 For more trending articles, visit https://ow.ly/QpUE50ZztQ8.

In this issue: A wearable patch for monitoring Parkinson’s disease treatment, the effects of plant-based diets on gut bacterial metabolites, and thermal thresholds for lake ice cover decline. In PNAS: https://ow.ly/66lg50ZztOb

A legacy of slavery: For every 10% increase in the proportion of a US county’s population that was enslaved in 1860, there are around 22 additional deaths per 100,000 people in contemporary Black populations, relative to White populations. In PNAS: https://ow.ly/OTZs50Zztzl

Journal Club: Giving poor households in rural villages cash can lead to a spike in spending, but also lasting benefits. In PNAS: https://ow.ly/m0iv50ZztHs

Saccharomyces cerevisiae helps brewers and bakers create their products, but is also used in dairy applications. The traditional fermented goat milk produced by the Yaghnob people of Tajikistan contains a unique and ancient strain of this yeast. In PNAS: https://ow.ly/sncz50ZztEl

One of the most-viewed PNAS Nexus articles in the last week is “Life on the edge: Mesolithic population size and viability on Malta.” Explore the article here: https://ow.ly/GCMe50Zyw60 To learn more about submitting your own research, visit PNAS Nexus at https://ow.ly/UQRS50Zyw5Z.

When cities take steps to mitigate artificial light at night, it makes a measurable difference, both to the amount of light and to the timing of seasonal plant events, such as flowering, leafing out, and leaves changing colors in the fall. In PNAS Nexus: https://ow.ly/pPxX50ZyvZf

Estimates of global brain age obscure regional patterns that preview Alzheimer’s disease. A study used deep learning to estimate local brain age, identifying structures that look older than chronological age in people with cognitive impairment. In PNAS: https://ow.ly/mcBg50Zyux6

Discover one of the top-performing PNAS Nexus articles on Altmetric over the past three months! “Life on the edge: Mesolithic population size and viability on Malta” by James Blinkhorn et al. scored 84, driven by strong media attention. Read more: https://ow.ly/prky50ZyupT