"Modification of form is admitted to be a matter of time"
"In all works on Natural History, we constantly find details of the marvellous adaptation of animals to their food, their habits, and the localities in which they are found."
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Source: Alfred Russel Wallace (1853). “A Narrative of Travels on the Amazon and Rio Negro: With an Account of the Native Tribes, and Observations on the Climate, Geology, and Natural History of the Amazon Valley”, p.83, London : Reeve and Company
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