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Charles Darwin was the biologist who proposed the theory of natural selection.

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Richard Owen was a biologist who did not fully agree with Charles Darwin's ideas and had many conflicts with his method of thinking.

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Richard Owen was very mad at Charles Darwin for his theories, specifically that of the theory of natural selection. They both were very influential figures in Britain and had a great impact on the scientific progression of evolution theories. As we all know, Charles Darwin came out victorious in this feud and ended up becoming much more famous than Richard Owen.

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This feud took place in the mid 1800's and only lasted for a few years, until Darwin publicized his theories and was given mass appraisal for his ideas and opinions.