I just had his mind blown. Scientist at Stanford and Purdue Universities have discovered that the radioactive decay rate has a period that is associated with the rotation rate of the Sun! Well, the core of the sun which rotates slower at 33 days verse the surface at 28 days. Is it neutrinos or some other particle? I can't wait to find out more. Best cliff hanger ever. More details can be found in the paper Evidence for Solar Influences on Nuclear Decay Rates by Ephraim Fischbach et. al.