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Horizon

2009-2010

Episode 4: Who Is Afraid of a Big Black Hole?

Duration: 59 minutes

on BBC Four HD

Scientists now believe black holes could hold the key to answering the ultimate question: what was there before the big bang? However, researching them is next to impossible. Show more

BBC Four HD

About BBC Four

BBC Four reflects arts, music and culture with an ambitious range of intellectually and culturally enriching programmes, taking an expert and in-depth approach to its subjects.