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Jansen produced the first compound microscope by combining two convex lenses within a tube. Jansen's invention starts the innovative journey of more scientific discoveries that eventually leads to the development of Cell Theory.
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Aristotle had an illogical theory that living organisms can arise spontaneously from nonliving matter but there was nothing in these days to prove him wrong until technology was advanced to determine the truth so this is what people believed.
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Van Helmont's recipe states that mixing dirty clothing with wheat grains will produce mice after twenty-one days. This idea was believed for a while until scientists discovered information that defied its logic.
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Hooke discovered cells using a very primitive microscope. He discovered cells by looking at a cork under the microscope. The shape of the cells in the cork reminded him of the monk monasteries and so he dubbed them "cells."
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Leeuwenhoek was a microsope builder who had a large contribution in the development of cell theory as you will see as you move through this timeline.
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Leeuwenhoek's "Animacules" are microscopic animals.
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Leeuwenhoek discovers this bacteria from a sample of saliva from his mouth.
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Oken elaborated Wolfgang von Goethe’s theory that the vertebrate skull formed gradually from the fusion of vertebrae. Although the theory was later disproved, it helped prepare a receptive atmosphere for Charles Darwin’s theory of evolution.
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When Robert Brown was viewing grains of pollen through a microscope he noticed that they were all shaking and moving slightly. He hypothesized that the pollen must be alive. He then observed dust particles under the microscope and noticed the same thing. This ruled out the hypothesis. Although Brown didn't give a theory for the motion, it was still dubbed "Brownian Motion"
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Schwann, based on his own work, argued that all organisms contained cells. He stated what came to be known as cell theory: All organisms are composed of 1 or more cells.
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Kolliker’s investigations covered such diverse subjects as the development of cephalopods, the structure of smooth muscles, the development and differentiation of red blood cells, and the significance of the germ layers in development.
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Rudolf was one of the first to agree with Robert Remack's theory of cell devision. At first Rudolf thought that the theory only applied to certain cells, but upon the realization that Remack might be correct, he plagerized the work and created the epigram, "every cell originates from another existing cell like it."
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Pasteur's realized that wine turns bitter because of microbes that enter the wine while it is being made. Pasteur's use of Pasteurization showed that applying a controlled amount of heat could kill the microbes without changing the flavor of the wine. He later used this method to preserve food, milk, and beer.
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Shlieden compared his work with Theodore Schwann after his discovery. They noticed that in young cells there were neuclei, and then from more observation they concluded that new cells come from the nucleus.
