- Country: Soviet Union
- Genres: Documentary, History
- Release:
- Director: Pavel Klushantsev
- Writers: Vladimir Gryaznov
- Language: Russian
- Stars: Leonid Khmara
- Runtime: 50 min
- Awards: N/A
- AKA: The Secret of Substance (United States of America) , Тайна вещества , The Secret of Substance (United Kingdom) , The Secret of Substance , Tayna Veshchestva
- Plot:
The history of atomic energy, from Democritus and alchemists to the first nuclear power plant, atom-powered ships and spacecrafts.
- IMDB:tt5340896
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