Darwin, C. R. Engler, A. Gray, A. Hooker, J. D. Humboldt, A. von Lyell, C. Wallace, A. R.
Biogeography Botany Ecology Environment Evolution Exploration Fossils Geographic distribution Geophysics Natural selection Neo-Darwinism Polymorphism Sexual selection Uniformitarianism
biologist botanist geologist geophysicist naturalist
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