Professor Iain Stewart explains what meteorites and asteroids are, where they come from, the danger they pose and the role they have played in Earth's history. Show more
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Professor Iain Stewart explains what meteorites and asteroids are, where they come from, the danger they pose and the role they have played in Earth's history. 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.
