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Aristotle
He created the idea of spontaneous generation
Source: http://library.thinkquest.org/12413/theory.html -
Zacharias Jansen
Invented first compound microscope
Without the microscope people never would have seen cells
Source: http://www.history-of-the-microscope.org/microscope-history-timeline-design-development-inventions.php -
Jan Baptist van Helmont
Jan came up with the recipe for "mice." He was also known for his opinions toward spontaneous generation.
Source: http://www.nndb.com/people/852/000103543/
http://www.britannica.com/EBchecked/topic/260549/Jan-Baptista-van-Helmont -
Robert Hooke
Gave cells their name. Promoted cell theory because now they have something to build off for their idea of cell theory.
Source: http://www.pisgahscience.com/holmescc/module4/cell_theory.swf -
Anton van Leeuwenhoek
He was the first to see and describe bacteria, yeast plants, and the circulation of blood corpuscles in capillaries. He discovered microorganisms.
Source: http://inventors.about.com/library/inventors/blleeuwenhoek.htm -
Lorenz Oken
He stated that all oragnized beings come from and consist of vesicles and cells. He contributed to cell theory.
Source: http://www.lorenzoken.com/ -
Robert Brown
Brown discovered the cell nucleus in cells of the orchid. It was a key step to developing cell theory.
Source: http://bitesizebio.com/articles/history-of-cell-biology/ -
Theodor Schwann
He discovered animals were made up of cells and published a book which included the first statement of the cell theory. He co-founded the idea of cell theory with Matthias Schleiden.
Source: http://science.howstuffworks.com/innovation/scientific-experiments/scientific-method4.htm -
Matthias Jakob Schlieden
Schleiden was the first to recognize that all plants, and all the different parts of plants, are composed of cells. This idea supported cell theory because it names cells as a major component in life. He also co-founded the idea of cell theory with Theodor Schwann.
Source: http://science.howstuffworks.com/innovation/scientific-experiments/scientific-method4.htm -
Albrecht von Roelliker
Albrecht von Roelliker realized that sperm cells and egg cells are also cells. This contributes to cell theory because later, instead of spontaneous generation, they'll discover that sperm and egg cells are needed to reproduce other livings things you do not use a formula.
Source: http://bitesizebio.com/articles/history-of-cell-biology/ -
Rudolf Virchow
Proposed that all living cells must come from pre-existing cells. This promoted the idea of cell theory because it describes cells as building blocks of life.
Source: >>http://science.howstuffworks.com/innovation/scientific-experiments/scientific-method4.htm</a> -
Louis Pasteur
He conducted an experiment to test whether sterile nutrient broth could spontaneously generate microbial life. He proved that spontaneous generation is false.
Source: http://www.pasteurbrewing.com/the-life-and-work-of-louis-pasteur/experiments/louis-pasteurs-experiment-to-refute-spontaneous-generation/204.html
