I heard it on NPR. Researchers linked DDT exposure to obesity generations later. I was skeptical, with thoughts such as, “correlational data…” and “rats are not humans…” and even, “isn’t this like inheriting an experience? sort of Lamarckian, right?” I was intrigued. How could an external influence (DDT) result in changes that are inherited? I was glad to find open access to the original published research. I’ve learned some stunning things. An environmental event in one generation could affect the phenotype in subsequent generations! And in this case,…