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: Some [[scientist]]s used to believe the [[universe]] would end with all the [[matter]] falling back together. The [[Scientific Theory|theory]] was called 'The Big Crunch' but it seems unlikely to be true due to the counter [[Scientific Evidence|evidence]].
{{#ev:youtube|https://www.youtube.com/watch?v=itpLU7OzNV8}}
==Beyond the Curriculum==
{{#ev:youtube|https://www.youtube.com/watch?v=nrTsvn9usVQ}}