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Do parallel universes exist? We might live in a multiverse | Space
In a Parallel Universe, Another You - The New York Times
A Physicist Explains Why Parallel Universes May Exist - NPR
Does a Parallel Universe Really Exist? | HowStuffWorks
The Case for Parallel Universes | Scientific American
Multiverse - Wikipedia
Parallel universe - Wikipedia
A Guide to Different Kinds of Parallel Universes | NOVA | PBS
What is the multiverse—and is there any evidence it really exists?
Parallel Universes | Scientific American