This is a poor, and fairly useless article. The source it links to is better though.<p>Summary. Brian Greene is a respected and credible theoretical physicist who teaches at Columbia and has written several books.<p><a href="http://en.wikipedia.org/wiki/Brian_Greene" rel="nofollow">http://en.wikipedia.org/wiki/Brian_Greene</a><p>Greene wrote a book published in 2011 about multiple universes called "The Hidden Reality: Parallel Universes and the Deep Laws of the Cosmos".<p><a href="http://www.amazon.com/The-Hidden-Reality-Parallel-Universes/dp/0307278123" rel="nofollow">http://www.amazon.com/The-Hidden-Reality-Parallel-Universes/...</a><p>When he was doing his book tour for that one, the 9News article was written and features an excerpt from the first chapter of the book.<p><a href="http://www.9news.com/news/article/182664/509/Is-there-another-you-reading-this-in-a-parallel-universe" rel="nofollow">http://www.9news.com/news/article/182664/509/Is-there-anothe...</a><p>Somebody at this IEET site, whatever it is, found the 2 year old article and today published a poor summary of it filled with mumbo jumbo and hand waving. That is what is linked to by OP.<p>To find more information about how the multiverse theory is testable, presumably the details are in his book, which has fairly good reviews on amazon and is the #4 best seller in the category of Quantum Physics.<p>A summary of the book's content is present on a wikipedia page dedicated to it.<p><a href="http://en.wikipedia.org/wiki/The_Hidden_Reality:_Parallel_Universes_and_the_Deep_Laws_of_the_Cosmos" rel="nofollow">http://en.wikipedia.org/wiki/The_Hidden_Reality:_Parallel_Un...</a>