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Evolution of the Human Brain

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Michael Liu

on 12 March 2013

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Transcript of Evolution of the Human Brain

By Davis Wu and Michael Liu Evolution of the Human Brain The Evolution of the Human Brain Why did the brain grow bigger? The first human appeared about six million years ago. What has happened to the human brain between then and now? 6-2 million years ago Brain Size Increases Slowly Brain and Body Size Increase Brain size Increases Rapidly During this time period, early humans began to walk upright and make simple tools. The brain size had increased but only by a little. Intro 2 million- 800,000 years ago During this time period, humans began migrating around the world encountering many new environments on different continents. These obstacles, along with an increase in body size, led to an increase in brain size. 800,000- 200,000 years ago The brain evolved more rapidly during the time of climate change. Larger, more complex brains enabled early humans of this time period to interact with each other and with their surroundings in new and different ways. As the environment became more unpredictable, our brains grew to adapt to our environment. Human Brain volume throughout time Homo Habilis- Volume: 600 cm^3
Homo Erectus- Volume: 800-1100 cm^3
Homo Neanderthals- Volume: 1200-1900 cm^3
Homo Sapiens- Volume-1330 cm^3 Note: The Neanderthal brain was even larger than the typical human brain! The evolution of the human brain is a fascinating topic, as our species began to evolve almost 6 million years ago, our brains also evolve. Why has the human brain evolved to become what it is now? As early humans faced new environmental challenges and evolved bigger bodies, they developed larger and more complex brains. - Large, complex brains can process and store a lot of information. That was a big advantage to early humans in their social interactions and encounters with unfamiliar habitats. And now, a comic... Our early ancestors originated in Africa almost 6 million years ago. Human Migration g2g now bye
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