Darwin and domestication.
D000818:Animals; D000829:Animals, Domestic; D005075:Biological Evolution; D001695:Biology / Q000266:history; D010856:Columbidae; D004739:England; D014644:Genetic Variation; D006041:Goats; D049672:History, 19th Century; D006823:Hybrid Vigor; D008093:Literature, Modern; D010944:Plants; D012756:Sheep