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Jansen created the first basic microscope. It was a single lens microcope.
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This is not the actual date. The actual date was around 340 B.C. I put it here to scale the timeline reasonable.
Aristotle classifies all known organisms as either a plant or an animal. He writes that living things can arise spontaneously from non-living matter. -
Jan Baptist van Helmont believed in spontaneous generation and produdced an experiment with mice. He thought living things come from nonliving organisms.
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Robert Hooke discovered the first cell. The first cell was a cork sample he saw under a compund microscope.
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Leeuwenhoek observed the first living cell under a microcope. Without him no one would know what a living cell looks like.
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Oken discovered that all living organisms are made of and consist of cells. Without him, people wouldn't know what humans are made of
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Robert Brown discovered the nucleus of the cell. Without him, no one would know what the nucleus looks like or what it does.
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Schwann and Schleiden together discovered cell theory. They said cells are the basic building blocks of living things. Without them, cell theory wouldn't have been discovered.
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Roelliker discovered that sperm and egg cells are also under the catergory of cells.
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Pasteur disproved spontaneous generation by using an experiment that described cell theory beyond doubt and strengthened the steps of the scientific method.
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Virchow said that cells only develop from existing cells. Without Virhcow, people wouldn't know how cells multiply.
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www.softschools.com/timelines/cell_theory_timeline/96/ science.howstuffworks.com/innovation/scientific-experiments/scientific-method4.htm prezi.com/2neqtvrncc3m/cell-theory-timeline/
