Horizon reveals the scale of the problem of space junk. In 2014, the International Space Station had to move three times to avoid lethal chunks of space debris. Show more
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Horizon reveals the scale of the problem of space junk. In 2014, the International Space Station had to move three times to avoid lethal chunks of space debris. Show more
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.
