> The most exciting phrase to hear in science, the one that heralds new discoveries, is not “Eureka” but “That’s funny...”
Isaac Asimov

But before getting excited, I want to see some checks. If you feed Eureka half the data does it choose a similar model? And are you sure this is not some artefact related to the use of calendar months and years? Inferring peroids of about a month from monthly data makes me suspicious.