This is a poor, and fairly useless article. The source it links to is better though. Summary. Brian Greene is a respected and credible theoretical physicist wh

This is a poor, and fairly useless article. The source it links to is better though. Summary. Brian Greene is a respected and credible theoretical physicist who teaches at Columbia and has written several books. http://en.wikipedia.org/wiki/Brian_Greene http://en.wikipedia.org/wiki/Brian_Greene Greene wrote a book published in 2011 about multiple universes called "The Hidden Reality: Parallel Universes and the Deep Laws of the Cosmos". http://www.amazon.com/The-Hidden-Reality-Parallel-Universes/dp/0307278123 http://www.amazon.com/The-Hidden-Reality-Parallel-Universes/... 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. http://www.9news.com/news/article/182664/509/Is-there-another-you-reading-this-in-a-parallel-universe http://www.9news.com/news/article/182664/509/Is-there-anothe... 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. 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. A summary of the book's content is present on a wikipedia page dedicated to it. http://en.wikipedia.org/wiki/The_Hidden_Reality:_Parallel_Universes_and_the_Deep_Laws_of_the_Cosmos http://en.wikipedia.org/wiki/The_Hidden_Reality:_Parallel_Un...