I have just discovered this, plus many women have confirmed this. When 2 or more women live together in a house for a longer period of time, their biological (menstrual) cycles shift, until they all get synchronized to be coincidental. Isn't this another fact that proves that there is much more to life than what the sciences of physics and chemistry and biology can describe? Why do you think this happens? (I may be wrong, but at this time I lean to think that this is a solid and repeatable manifestation of the non-physical supernatural world.) What's your take?