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Found at my grandparents’ house: a 1910 article on Tesla’s latest work — to create artificial 24hr sunlight, the world over!
“He proposes to create an artificial aurora borealis which will diffuse light over miles and miles of the earth’s surface, converting night into day and ending the age-long alternation between sunshine and shadow.”
I think Edison may have won this round by powering cities and office buildings — about as close to perpetual light as we can tolerate.
What a find. Wow.