If, once in lifetime, you see a blue moon, don't think your eyes are playing tricks on you. It's caused by dust in our upper atmosphere; ice crystals are what make you see rings round the moon.Over the centuries, magical powers have been attributed to the moon. It has been said to bring on lunacy, affect the growth of plants, eyes of cats, spots of panthers, functions of women and activities of ghosts. France once had a law against cutting timber except during waning moon, and to a lesser degree the sun, does cause the ocean tides because of the gravitational pull. But a common mistake of primitive people is to think that everything timed in the same rhythm as the moon is caused by it.