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In most major cities before public lighting, people had to carry torches at night.
1:42
Before modern energy, surgery in hospitals was a nightmare
2:34
Thanks to modern energy innovations, the horse manure crisis simply disappeared.
1:44
An exclusive look at "A Farm Woman's Dream", a deleted scene from the documentary series.
1:12
Capitalism and communism clashed in the middle of a model kitchen in 1959.
