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Name: Alex
Status: student
Grade: 9-12
Location: Outside U.S.
Country: Canada
Date: April 4, 2011

My question involves the multiverse hypothesis. Assuming the multiverse does in fact exist, does the concept of time exist outside each universe, or in other words, the "space" between universes. If time does not exist in this void, how can universes expand into the void or come into contact with each other? Wouldn't those interactions require time to take place? Also, would a lack of time imply that we have a fixed amount of universes in this hypothetical multiverse; an immense number that will neither grow nor shrink?


Check out the book "The Hidden Reality: Parallel Universes and the Deep Laws of the Cosmos," by Brian Greene (Jan 25, 2011). The answer to your question and many others are in this book. It is quite readable.

David Kupperman


Time is difficult to explain. Space is difficult to explain. Distance and time are defined with our universe, as part of our universe. Nobody can say what is beyond. Space might not exist beyond. Although our universe takes up space within, it might not from the outside. Our universe might be just energy from the outside, if energy exists outside. As our language is created by comparison to real objects, we do not have words for things that do not fit within our universe. We can have equations. We can compare what these equations yield to real objects. But if outside is not like anything within the universe, languages don't have the necessary words.

Time seems to work very much like distance, with one difficulty. Our minds experience and detect time differently from distance. Consider walking along a floor but not being able to ever look forward or backward, and not being able to change how you move. This is kind of how we "see" time in day-to-day life. We do not really know what it is, but we know how to measure it and how to make use of it. Time from outside might be just another distance, all universes existing at all times, all contacts existing together. It could be that outside there is no "before" or "after". If we cannot measure outside the universe, we cannot know.

Dr. Ken Mellendorf Physics Instructor Illinois Central College

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