Old (and true) copy pasta:
"There are 4000-8000 religions actively practiced today, worshipping 200,000-600,000 deities, depending on how you count. In 60,000 years of Human history, we have records of 20,000 religions worshipping over 2,000,000 deities. All told, it is estimated that in total there have been 60,000-70,000 religions worshipping upwards of 28,000,000 deities since the dawn of modern Man. That doesn't even include the religions of our evolutionary ancestors (for example there is evidence for neanderthal and other AMH societies having both religious and artistic tendencies)."
Science is far more self-consistent than Religion. Science has undergone a series of universally accepted (r)evolutions to better explain what evidence was available at the time. Religion is nothing more than a series of tens of thousands of sects with superstitious beliefs (nearly) all insisting that every other sect is wrong, sometimes with enough passion to start wars over.
Besides, I don't think you understand the definition of "theory" in a scientific sense. See:
http://en.wikipedia.org/wiki/Theory