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