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Aristotle is the first to classify organisms into two groups Invertebrates and vertebrates
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Ceasalpino creates a classification system based on growth habit and seed forms this lead him to write de plantis which contained 1500 species.
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The invention of the light microscope allows scientist to study organisms at the cellular level.
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John Ray wrote a book called Methodus plantarum nova containg 18000 species.
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Carl Linnaeus introduced the hierarcly classification system. Which had 2 kingdoms.
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Ernst Haeckel proposed a third kingdom, Protista.
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Ernest Rutherford invents the radio metric dating system allowing scientist to determine the age of fossils.
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Édouard Chatton introduces the 2 domains Procaryotes and Eucarya.
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With the invention of the electron microscpe scientist are able to study the cell in more depth. Leading to the discovery of procaryote eucaryote cells.
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Herbert Copeland adds the fourth kingdoms Monera.
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Robert Whittaker proposed the fifth kingdoms Fingi.
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DNA sequencing allows scientist to further understand relationships between different species.
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Carl Woese splits the Monera kingdom into Eubacteria Archeabacteria
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Carl Woese creates the 3 domains; Bacteria, Archea and Eucarya.
