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Through the Wormhole: What is Nothing? / Season: 3 / Episode: 5 (00030005) (2012)
Production Code: 00030005
June 27, 2012
Is empty space really empty? Or is it filled with hidden forces? Scientists now regard understanding the true nature of empty space as the deepest and most baffling mystery they face: one that will explain where the universe came from, whether it is fated to expand into oblivion or whether it will undergo another dramatic transformation that could destroy everything we know.