GARY BROWN / SCIENCE PHOTO LIBRARY GARY BROWN / SCIENCE PHOTO LIBRARY
Caricature of the British geologist and lawyer Sir Charles Lyell (1797-1875). Lyell's vast work 'Principles of Geology' formed the basis of much of modern geology, especially stratigraphy. He made key contributions to the study of earthquakes and volcanoes. Although he was a great friend to and influence on Darwin, he only partly accepted evolutionary theory due to his deep religious beliefs. Lyell was knighted in 1848.
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