How did Charles Darwin develop the theory of evolution?

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Charles Darwin developed his theory of evolution by natural selection through extensive observations during his voyage on the HMS Beagle from 1831 to 1836. He collected numerous specimens and noted variations in species, particularly the finches of the Galapagos Islands. Darwin's seminal work, On the Origin of Species, published in 1859, detailed how natural selection drives evolutionary change within species and leads to the formation of new ones. This theory posited that individuals with advantageous traits are more likely to survive and reproduce, passing those traits to their offspring. Darwin's work revolutionized the understanding of life's diversity and established the foundation for modern evolutionary biology.12345