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USA - 1987 - Differences between bacteria and protozoans are shared.
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CIRCA 1981 - A woman talks about her work as a research scientist for NASA (narrated by Ricardo Montalban).
CIRCA 1981 - A woman talks about her work as a research scientist for NASA (narrated by Ricardo Montalban).
Usa - 1981 - different kinds of microorganisms live at the seashore, atop a wintry mountain, and in a hot spring.
1980s: Microscopic view of cells.

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3416880229
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USA - 1982 - Microorganisms swim in a pond.

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