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[Sci-Am] 50, 100 & 150 Years Ago: March 2021 - Scientific American - 2021-03-11
50, 100 & 150 Years Ago: March 2021
Lethal gas fights crime, 1921; baby energy powers cleaning, 1871
-- Read more on ScientificAmerican.com
https://www.scientificamerican.com/article/50-100-150-years-ago-march-2021/