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1. "Darwin Day 2021: Celebrating Charles Darwin's Scientific Achievements" - ScienceAlert, February 12, 2021 2. "Charles Darwin's Theory of Evolution: What You Need to Know" - Live Science, February 12, 2021 3. "Charles Darwin: A Brief Biography" - National Geographic, February 12, 2021 4. "Charles Darwin: The Father of Modern Evolution" - Smithsonian Magazine, February 12, 2021 5. "Charles Darwin: His Life and Legacy" - BBC News, February 12, 2021 6. "Charles Darwin and the Origin of Species" - The New York Times, February 12, 2021 7. "Charles Darwin's Theory of Evolution: What You Need to Know" - US News & World Report, February 12, 2021 8. "Charles Darwin: The Man behind the Theory of Evolution" - CNN, February 12, 2021 9. "Charles Darwin: His Life and Impact" - Encyclopedia Britannica, February 12, 2021 10. "Charles Darwin and the 'Origin of Species': A Look at His Life and Work" - TIME, February 12, 2021
The existence of ant colonies was a mystery even to the famous naturalist Charles Darwin. How could evolution produce workers that cannot reproduce? Darwin assumed that workers increase the reproductive success of their queen, thereby explaining the so-called reproductive division of labor: males provide sperm, which the queens store and use to fertilize eggs throughout their lives. Workers search for food, care for the brood and defend the nest, but do not reproduce.