Unified subject map of physics – 130 years

An interesting paper on arxiv today, which charts the “disciplinary evolution of 130 years of physics”

Nguyen, Khoa, Pragyan Pandey, Sophie Li, and Eric Y. Ma. ‘A Unified Subject Map for 130 Years of Physics’. arXiv:2606.14043. Preprint, arXiv, 12 June 2026. https://doi.org/10.48550/arXiv.2606.14043.