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Made a theory about embryos, that they (embryos) gradually develop into "undifferentiated material."
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Believed to create the first microscope, and/or at least the first truly compound microscope.
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Partially discovered photosynthesis, studied the cells of plants and the way they gain their food.
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Discovered plant cells, figuring out that the whole thing is made up of tiny structures (cells).
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Discovered single cell organisms and blood cells, and made over 500 microscopes.
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Studied, and wrote a book on, how all living things come from and consist of cells.
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Credited for finding the nucleus of the cell, best known for discovering the movement of microscopic particles in a solution, now called "Brownian motion."
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Credited for his cell theory and defining the cell as the basic unit of animal structure.
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Theorized and proved that all plant tissue is made of cells. Declared cells as the basic building block for plants.
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Discovered that sperm and eggs are made of cells, setting up the fact that humans are always made of cells.
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Theorized that all living cells come from pre-existing living cells, and that theory was proven to be true for all things so far.
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Developed the process of cleaning a substance, named after him as "pasteurization."
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Discovered previously unknown organelles in the cells.
