[Sci-Am] 50, 100 & 150 Years Ago: March 2021

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[Sci-Am] 50, 100 & 150 Years Ago: March 2021

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2021-03-11, 15:38

50, 100 & 150 Years Ago: March 2021

Lethal gas fights crime, 1921; baby energy powers cleaning, 1871

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