Season 3 Episodes23
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Europe's heritage of pictures, statues, and buildings is being destroyed at a frightening rate by atmospheric pollution, but an American scientist has just invented a method of preserving limestone. In 1908, a vast explosion shook the Tungus district of Siberia: was it due to the biggest
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"Chance and Decay / Meteorite Mystery" is episode 8 of Horizon season 3. It aired on April 10, 1966.