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Buffon's idea that species change over time has become the cornerstone of the modern of evolutionary theory.
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He brought forward the idea that all animals came from a common ancestor. This means that many animals share similar bone structure, bodily functions etc
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His main theory was that life evolved from simple forms, such as molluscs, to complex forms, such as humans.
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Population grows geometrically but food grows arithmetically
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Lyell argued that the formation of Earth's crust took place through countless small changes occurring over vast periods of time, all according to known natural laws.
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Wallace's line. Wallace noted that East of the line resembled species from Australia and West of the line resembled species from Asia