The French solar power pioneer who was light years ahead

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https://www.theguardian.com/environment/2023/jul/27/augustin-mouchot-french-pioneer-solar-power-engine

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See also https://en.wikipedia.org/wiki/Augustin_Mouchot

Aside from the fact that this was in the 19th century, the other really impressive thing is he was a working math teacher!