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By Don Lincoln
Updated 1504 GMT (2304 HKT) May 14, 2017

 

(CNN)A recent astronomical observation of a "cold spot" in the universe is stirring the interest of scientists who are intrigued with an exciting and highly speculative theory that there may be more than one universe.

Now before you get incredibly excited about that prospect, I should caution that this particular explanation is a huge long shot and there are more prosaic possible explanations. The idea of multiple universes, or multiverses, is a highly speculative and contentious one, and many experts view it with a very jaundiced eye. (This includes me.)

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