[ETL]

it is perfectly believable the neutrino flux from all the nuclear reactions in the sun, slightly influences some sensitive decay rates, and varies with distance.

But neutrinos pass through matter without hardly ever interacting with it.

[JasonC]

Um, each one has minimal cross section sure, but where do you think they come from and what do you think they cause when then do interact with matter? When you have a hot enough reactor, which is what the sun is, enough get put out for some to interact. And their sig is monkeying with weak force reaction rates.

neutrino reaction rates