Season 5 Episodes9
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Ranked #1 of 8 in Season 5•+0.1 vs season avg
Recent discoveries could explain how supermassive black holes grow so big, one of the universe's most mysterious questions. Neither dark matter nor cannibalism can fully explain these monsters, but the latest science might finally provide an answer.
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"Black Holes: The Secret Origin" is episode 3 of How the Universe Works season 5. It scored 8.5/10 from 86 votes, ranking #1 of 8 episodes this season (season average 8.4). It aired on December 6, 2016.