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In this link: http://science.howstuffworks.com/science-vs-myth/everyday-myths/parallel-universe2.htm

The split causes a whole new universe.

In this link:http://plato.stanford.edu/entries/qm-manyworlds/#2.1

"The concept of a world in the MWI is based on the layman's conception of a world; however, several features are different. Obviously, the definition of the world as

*everything that exists*does not hold in the MWI. “Everything that exists” is the Universe, and there is only one Universe."

So even the concept of world is in dispute. I find it hard to believe that the split of the entire universe occurs multiple times for every quantum event.. So if a photon is measured, the whole universe is split multiple times. All the millions of galaxies 5 billion light years away are also split multiple times?

It sounds like a mathematical solution in search of a physical universe. Do the physicists who think this is correct basically mathematicians who what it to be true because of the mathematical elegance of the solution?

Thanks,

John