I don't know how credible this theory is, because I haven't had time to actually research it myself, but it's interesting nontheless. Here's a link that explains it: The theory. The part I wanted to direct your attention to was the third article, down on the page, after the two about Einstein (these are interesting as well), so if you want to read those as well, by all means, enjoy them.

I thought people might enjoy reading about this theory and researching it.