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Referenced when discussing Darwin's theory of evolution and noting that he was too nervous to include his theory about human evolution in this earlier work

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Referenced in discussion of how Sade prefigured Darwinist ideas about survival of the fittest

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Referenced as Darwin's major work where the Galapagos finches feature as evidence for his theory of evolution by natural selection

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Gordon mentions that Darwin 'spends quite a bit of time in origin and species talking about pigeons' in relation to selective breeding and drawing analogies between artificial and natural selection.

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Mentioned in discussion of the 1868 Aboriginal cricket tour of England, noting Darwin's work 'had just come out' about 10 years earlier, affecting how the visiting team was perceived

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Referenced in discussion about the timing of the Neanderthal discovery, noting it was announced around the same year (1859) as Darwin's famous work was published.