Fair rating?How the Universe Works· Season 5 · Episode 2
Black Holes: The Secret Origin
Recent evidence could explain how supermassive black holes grow so big; neither dark matter nor cannibalism can fully explain these beasts, but the latest science may finally provide an answer.
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#7In Season 5of 8 rated episodes
#87All-timeof 92 rated episodes
−0.6vs season avgSeason 5 averages 8.2
2016First airedDecember 6, 2016