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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
Understanding the material basis of adaptive evolution has been a central goal in biology dating back to at least the time of Darwin. One focus of current debates is whether adaptive evolution relies on many mutations with small and roughly equal effects, or is it driven by one or a few mutations that cause major changes in traits.