Is there really no feasible natural explanation for inhomogeneities in stable magnesium isotopes in materials such as those found in, say, meteorites? How frequently do scientists do such fine-grained nanoSIMS analysis of materials containing magnesium? If the answer is “not at all frequently,” is it possible that this is within the boundaries of natural variation in these materials? I want to believe, I’m just a bit frustrated by the lack of context presented alongside this interview.