Why the Big Bang Definitely Happened
Season 1 Episode 43 | 8m 54s
We pretty much know for sure that the universe was once extremely small, and extremely hot. And we know that something set it in motion, expanding rapidly and continuing to do-so today. But the actual moment of ‘the Big Bang’ is still a bit of a grey area within physics.
Aired: 07/31/16Video has closed captioning.