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Thomas Malthus’s ‘An Essay on the Principle of Population’ published
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Charles Lyell’s ‘Principles of Geology’ published
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Darwin sailed to South America and studied Galapagos Finches and their varying beak size and shape
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Charles Darwin returned to England from the Galapagos Islands
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Origin of the Species published by Darwin
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The Huxley-Wilberforce debate over Darwin’s theory of evolution
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DNA molecule discovered by James Watson and Francis Crick
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Scientists modified Darwin’s discoveries of natural selection to include genetics’ effect on adaptations.