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Hans and Zacharias Jansen using two convex lenses created the world's first compound microscope.
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An English scientist called Robert Hooke examined a cork slice under compound microscope. He described the cork as porous, like a honeycombe and that the pores or cells contained multiple little boxes.
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Francesco Redi disproved the theory of spontaneous generation. Redi showed that meat cannot develop into flies and that only flies can make more flies.
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Anton van Leeuwenhoek (a Dutch scientist) used his microscope to examine pond water. He described the unicellular organisms that he could see as 'animalcules'.
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Anton van Leeuwenhoek continued to use his microsope to examine cells. He submitted a letter to the Royal Society. He discovered the first Protoza and Bacteria in this letter.
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The Nucleus of plant cless was discovered by English botanist Robert Brown
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German botanist Matthias Schleiden proposed that plant tissue is made up of cells and that cells are the basic building blocks of all plants.
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Theodor Schwann with Matthias Schleiden created the cell theory of life. He proposed that all living things are made up of cells.
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Rudolph Virchow added the last rule to cell theory.That all cells develop from existing cells. He also proposed that diseses cells caome from healty cells
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An experiment was conducted by Louis Pasteur. Pasteur came to the conclusion that soup in a container with an S shaped neck did not contain micro organisms because the organisms developed in the neck of the S.
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Lazzaro Spallanzani, an Italian abbot and botanist, discovered that soup that was not exposed to the air did not contain micro organisms. He proposed that these micro orgainisms came from the air.
