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Keywords: Descent fig02.jpg Woodcut depicting the similar appearance of a human embryo top and a dog embryo bottom from Charles Darwin's Descent of Man 1871 Original caption Fig 1 Upper figure human embryo from Ecker Lower figure that of a dog from Bischoff http //darwin-online org uk/content/frameset itemID F937 1 viewtype text pageseq 381 1871 See above Public domain PD-old-70 The Descent of Man and Selection in Relation to Sex 1871 Embryos |