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Aristotle supported spontaneous generation. He proposed that life arose from nonliving material if it contained vital heat.
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Zacharias Jansen, with some help of his father, created the first compound microscope. They realized if you put a small object in a tube with several lenses it appears larger.
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In the 17th century, Jan Baptist van Helmont conducted one of the first experiments to prove spotaneous generation, but declared his was unique. He placed a dirty shirt with some wheat and said mice were born 21 days later.
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Robert Hooke was looking at cork under a microscope and named cells because he thought they looked like jail cells,
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Fransesco Redi, an Italian scientist, conducted an experiment to test spontaneous generation. He cocluded that maggots came from fly eggs and disproved spontaneous generation.
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Van Leeuwenhoek, a Dutch tradesman, learned to grind lenses to create a simple microscope. He created the first single lense microscope.
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Lorens Oken, German Nature-Philosopher and microscopist, reported that all living organisms oringinate from and conist of cells.
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Theodor Schwann discovered that all animals are made of cells and that cells are the building blocks of all animals. He also proposed unfied cell theory.
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Robert Brown discovered the role of and named the nucleus. He helped confirm the second half of cell theory.
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Matthias Schleiden discovered that plants are made of cells. Cells are the building blocks of plants.
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Albrecht von Roelliker discovered that sperm and eggs are also cells.
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Rudolf Virchow came to the conclusion that all living things are made of cells. Each cell has all of the characteristics of a living thing.
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Louis Pasteur brought the idea of spontaneous generation to an end with the exoerinents he conducted.
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John Tyndall helped disprove the idea of spontaneous generation by showing food doesn´t decay in germ free air.
