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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 which conservationists hope will change the situation radically. Also: Meteorite Mystery - In 1908 a vast explosion shook the Tungus district of Siberia: was it due to the biggest meteorite ever to hit the earth, or something odder? The Russians, after sending out many expeditions, have just released a filmed report. | |
Uitzending: | 10/04/1966 |
Rating TheTVDB: | Nog geen stemmen uitgebracht |
IMDB ID: | Niet beschikbaar |
Laatste update: | 13/11/2019 om 11:55 |