"As the researchers pored through published data on specific isotopes, they found disagreement in the measured decay rates – odd for supposed physical constants. Checking data collected at Brookhaven National Laboratory on Long Island and the Federal Physical and Technical Institute in Germany, they came across something even more surprising: long-term observation of the decay rate of silicon-32 and radium-226 seemed to show a small seasonal variation. The decay rate was ever so slightly faster in winter than in summer."
"All of the evidence points toward a conclusion that the sun is "communicating" with radioactive isotopes on Earth." Apparently solar radiation (of some type--probably neutrinos but nobody knows for sure) affects the inner workings of certain Earthly atoms.