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Recommended for: Grades 9-12

Resource: Darwin's Letters: Collecting Evidence

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This group of letters is a sample of the extensive correspondence Darwin carried on with a wide group of friends and colleagues as he collected evidence to support his theory of evolution by natural selection.

Teachers' Domain, Darwin's Letters: Collecting Evidence, published September 26, 2003, retrieved on ,
http://www.teachersdomain.org/resource/tdc02.sci.life.evo.darletters/

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Darwin sought information from his many contacts to help him refine his theory. In these letters, he discusses the range of variation that can be observed in both wild and domestic animals, his observations on the number of seedlings that are eaten by slugs, and whether seeds and small snails are ever transported on the feet of wading birds. All of this varied information helped him form his theory and convinced him that the process of evolution which he proposed could in fact explain the patterns he saw in the natural world.