BierdopjeV3 Alpha nu beschikbaar. Wil je helpen? Kijk dan hier

Horizon - Chance and Decay

Seizoen: 1966 - Aflevering: 8 / 457 - Eerst uitgezonden: 10 april 1966 - Episode ID: 457932

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.