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Viser: The Cradle of Humanity - How the Changing Landscape of Africa Made Us So Smart
The Cradle of Humanity
How the Changing Landscape of Africa Made Us So Smart
Mark Maslin
(2017)
Oxford University Press, Incorporated
288,00 kr.
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- Hardback: 256 sider
- Udgiver: Oxford University Press, Incorporated (April 2017)
- ISBN: 9780198704522
One of the fundamental questions of our existence is why we are so smart. There are lots of drawbacks to having a large brain, including the huge food intake needed to keep the organ running, the frequency with which it goes wrong, and our very high infant and mother mortality rates compared with other mammals, due to the difficulty of giving birth to offspring with very large heads. So why did evolution favour the brainy ape? This question has been widely debated among biological anthropologists, and in recent years, Maslin and his colleagues have pioneered a new theory that might just be the answer.
Looking back to a crucial period some 1.9 million years ago, when brain capacity increased by as much as 80%, The Cradle of Humanity explores the implications of two adaptive responses by our hominin ancestors to rapid climatic changes - big jaws, and big brains. Maslin argues that the impact of changing landscapes and fluctuating climates that led to the appearance of intermittent freshwater lakes in East Africa may have played a key role in human evolution. Alongside the physical evidence of fossils and tools, he considers social theories of why a large, complex brain would have provided a major advantage when trying to survive in the constantly changing East African landscape.
1. In the Beginning2. Early Human Evolution3. Tectonic and Climate4. Cradle of Humanity5. Global Climate Change6. Celestial Mechanics7. African Climate Pulses8. The Social Brain9. Future of Humanity10. The Story So FarFurther Reading
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