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- 2. Charles Robert Darwin Charles Robert Darwin (12 February 1809 – 19 April 1882) was an English
- 3. Darwin published his theory with some evidence for evolution in his book “On the Origin of
- 4. However, many favoured competing explanations and it was not until the emergence of the modern evolutionary
- 5. The journey on the Beagle The Beagle was a ship used for a cartographic consignment of
- 6. The possibility of working, during the journey directly on the field, allowed him to study the
- 7. Thanks to those studies Darwin began detailed investigations and in 1838 conceived his theory of natural
- 8. Darwin’s Work Darwin's work established evolutionary descent with modification as the dominant scientific explanation of diversification
- 9. How Darwin conceived his idea He based his theory on fourth different evidences Direct Observation Biogeography
- 10. Direct Observation
- 11. The first evidence is the direct observation. The first object of his interest were the artificial
- 12. To explain the second case, we could talk about the Biston Betularia.
- 13. Biston betularia is a white moth, which lives in Manchester. In the '800 a lot of
- 14. Why? Because the trees, contaminated by smokes, had become black, and the white moth, resting on
- 15. Biogeography The second evidence is biogeography. Darwin had noticed that in the same area, there were
- 16. Fossils
- 17. The third evidence were fossils. During his journey on the Beagle, Darwin studied a lot of
- 18. Homologous Structures The fourth evidence was the discover of a homologous structure that was shared by
- 19. An Incompleted Theory Darwin lacked of precision, and in his theory he didn’t explain the origin
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