Early Concepts of Evolution
Aristotle: nature evolved gradually from the simple to the more complex and from imperfect to perfect
Lucretius: wrote an evolutionary explanation of the origin of plants and animals
Leonardo da Vinci: put forward the theory of catastrophism
explains that fossil found in rocks resulted from a succession of fires and flood
that destroyed all things some time in the prehistoric past
Theory of Uniformatarianism
James Hutton: concluded that the formation of sedimentary deposits was due to geological forces
of erosion, sedimentation, uplift, and disruption on that were working in the past
and one continuing to the present
John Playfair: further explained and supported Hutton's concept
Sir Charles Lyell: proved beyond reasonable doubt the idea of geologic evolution through
his book Principles of Geology
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