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Nov 11, 1500
Spontaneous Generation
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Zacharias Jansen
Jansen is credited for developing the first optical telscope. Now cells could start being seen. -
Jan Baptist van Helmont
Helmont identified carbon dioxide. -
Robert Hooke
Hooke discovers the cell by looking at a thin piece of cork magnified at 50x. Now the development of the cell theory starts. He published his book titled Micrographia, a book describing his microscopic and telescopic observations. -
Anton van Leeuwenhoek
Antoni made modifications to previous made microscopes that could only magnify 20 to 30 times their size. They could now measure up to 200 times their size. He was the first to observe bacteria and protozoa. -
Lorenz Oken
Oken came up with a new system of animal classification that demonstrated the path of evolution. -
Robert Brown
Brown is the first to recognize the nucleus. -
Theodor Schwann
Schwann discovered Schwann cells in the peripheral nervous system. He said that all living things are composed of cells and cell products.Also invented the term metabolism. -
Matthias Schleiden
Schleiden helps in the establishment of the cell theory with the help of Theodor Shwann. He also states that cells are the building blocks of all plants. Recognized the importance of the cell nucleus and wrote a book titled Contributions to Pytogenesis. -
Albrecht von Roelliker
Roelliker discovers where life comes from and that eggs and sperm are also cells. -
Rudolf Virchow
Virchow's most widely known contribution to science is his cell theory, which is built on the work of Theodor Schwann. -
Louis Pasteur
Pasteur's work became the foundation of microbiology. He discovered many diseases were spread and passed on by germs. He proved spontaneous generation false. Also came up with pasteurization. -
Aristotle
Aristotle was known for his experimental approach and numerous dissections. He was drawn to animal classification.
