# PNAS > **Machine-Evolution Nexus:** [[articles/Digital Darwinism and the Invisible World of Machine Evolution|Digital Darwinism and the Invisible World of Machine Evolution]] places this node within the history and governance of substrate-independent evolution. **Domain:** Scientific Publishing / Institution **Doc Type:** Canonical Wiki Node **Maturity:** Developed ## Definition **PNAS** is the standard abbreviation and search route for the [[wiki/Proceedings of the National Academy of Sciences|Proceedings of the National Academy of Sciences]], a peer-reviewed multidisciplinary journal published by the [[wiki/National Academy of Sciences|National Academy of Sciences]]. In the Meyers cluster, PNAS has published work on real-time pandemic surveillance, COVID-19 contact tracing and testing, outbreak decision support, forecast ensembles, and influenza-vaccine impact. [[wiki/Meyers Lab|Meyers Lab]] highlighted a PNAS podcast discussion of its 2025 influenza-vaccine analysis in January 2026. ## Nexus Context It published the 2026 evolvable-AI argument and its active replies, moving population-level machine evolution into a current scholarly dispute. ## Evidence Boundary Publication establishes a citable research position, not consensus. The breeder-versus-ecosystem disagreement should remain visible rather than being flattened into prediction. ## Relationships [[wiki/Proceedings of the National Academy of Sciences|Proceedings of the National Academy of Sciences]], [[wiki/National Academy of Sciences|National Academy of Sciences]], [[wiki/Lauren Ancel Meyers|Lauren Ancel Meyers]], [[wiki/Meyers Lab|Meyers Lab]], [[wiki/UT COVID-19 Modeling Consortium|UT COVID-19 Modeling Consortium]], [[wiki/Evolvable AI|Evolvable AI]], [[wiki/Maarten Boudry|Maarten Boudry]], [[wiki/Peer Review|Peer Review]], [[wiki/Nature|Nature]] ## Sources / Provenance - Müller, Steels and Szathmáry (2026) and linked PNAS replies. - [About PNAS](https://www.pnas.org/about) (accessed 2026-09-23). - [Estimated impact of 2022–2023 influenza vaccines on annual hospital burden in the United States](https://pmc.ncbi.nlm.nih.gov/articles/PMC12646225/) (PNAS, 2025).