Biology / Bio 1645 · Atom · ~20 seconds
Darwin, Wallace, and the Path to 1859
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Charles Darwin and Alfred Russel Wallace independently reasoned to natural selection, jointly presenting the idea in 1858 before Darwin's 1859 *On the Origin of Species*.
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Darwin's 1831–1836 Beagle voyage, including stops in the Galápagos, supplied observations his natural-selection argument later drew on.
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The Beagle voyage did not deliver the theory — Darwin argued it two decades before publishing, once Wallace reached it.