What do we know about light?
- Year: 1955
- Country: Czechoslovakia
- Genre: Documentary
- Studio: Studio populárně vědeckých a naučných filmů Praha
- Keyword: educational, quantum physics
- Director: Bohumil Vošahlík
- Cast: Jiří Šrámek
1 1955 HD
1 2010 HD
1 1970 HD
It's time for muck spreading on the farm using all the muck that Farmer Tom has cleared from the cow's barn.
1 1970 HD
The forage harvester cuts the tall grass and then the brilliant baler squashes it into big bales.
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An apple harvester collects up apples that are given a good wash and the children make apple juice.
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