Climate leaves traces in polygenic scores

Analysis of expanded ancient‑DNA samples suggests that multi‑century cooling or warming can correlate with changes in population polygenic scores for traits such as height, educational‑attainment and personality. However, the signal varies by trait, is often spatial rather than strictly temporal, and is sensitive to correction for shared ancestry and historical migration. — If robust, the claim would change how researchers and journalists treat PGS time‑series: climate history could become a confounder or explanatory variable in genetic claims about trait change, with implications for science communication and identity politics.