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USA - 1982 - Microorganisms swim in a pond.
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1940s: Microscopic organisms are shown, in 1945.
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A doctor shows blast marks inside a hospital in Hiroshima, Japan, in 1946. (1940s)
CIRCA 1973 - A woman uses a microscope to observe antibodies fighting off germs.
CIRCA 1977 - Microorganisms are used to purify sewage in a conservation effort.

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3416855941
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Stok Video ID: 3416855941

USA - 1987 - Differences between bacteria and protozoans are shared.

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