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invented the first microscope,but the Dutch spectacle maker Zacharias Janssen (b.1585) is credited with making one of the earliest compound microscopes (ones that used two lenses) around 1600.19

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Anton Van Leuuwenhoek discovered the bacteria animacules in the date 1676 in other words he was the first even to think of looking certainly, the first with the power to see.

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In 1836 Schwann, a student of Johannes Müller, discovered pepsin and described an apparatus for quantitatively determining muscle strength, also considering the problem of spontaneous generation.

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Some time later, in 1838, Mattias Schleiden, a German botanist, concluded that plant tissues were made up of cells and that the embryo of a plant comes from a single cell.

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In 1858, Rudolf Virchow established what can be considered the second principle of cell theory: “Every cell comes from another pre-existing cell by division of this one.”

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Robert Hooke established that all plants are made of cells so he diovered in the 1600 but in other words he was the person that he saw that all plants are made of bacterias