Can We Live in Two Places at Once?

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I forget where I've heard this, but I remember hearing once that it was possible that somewhere in our universe an identical version of yourself was living an identical life. I wish I could remember where I heard it so I could explain it better, but I was just wondering if this were possible in our universe or is it explaining parallel universes? And if so is THAT possible?
 
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Hi! I'm the other identical version of you! Glad we finally meet. So it's possible but only on the PF. :smile:
 
If the two universes never interact, how could we ever prove or disprove it? As such, lacking falsifiability, this theory is 'non-scientific'. It's more of a philosophical question. :smile:
 
I suggest you read the stuff Max Tegmark has written about parallel universes: http://www.sciam.com/article.cfm?chanID=sa006&articleID=000F1EDD-B48A-1E90-8EA5809EC5880000, 2.
 

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