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jan 1, 1674 - 1674: Leeuwenhoek was the first person to observe living cells,which were unicellular organisms taken from lake water and rain gutters. He called these organisms "animalcules," meaning "small aniamls."

Added to timeline:

8 months ago
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Microscope

Date:

jan 1, 1674
Now
~ 344 years ago
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