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The cell theory was formulated in 1893 (date and month not specified) by Matthias Schleiden, Theodor Schwann, Rudolph Virchow.
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The existence of microscopic organisms was founded during the period 1665-83 by two Fellows of The Royal Society, Robert Hooke and Antonie van Leeuwenhoek.
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The Origins Of The Word 'Cell' In the 1660s (exact date and month not specified) was when Robert Hooke looked through a predated microscope at a narrowly cut piece of cork. He saw a series of enclosed boxes that reminded him of the miniature rooms, or cellula, that monks reside in.
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The first microscope was created in 1590 (the date and month was not specified) by the father and son team Hans and Zacharias Janssen.