In the span of two million years, a relatively brief period in evolutionary terms, the human brain has nearly tripled in size.
Our ancestor, Homo habilis, possessed a brain weighing approximately one and a quarter pounds. Today, the average human brain is almost three pounds.
This remarkable increase in brain mass was not merely a quantitative change but also a qualitative one.
The expansion included the development of new brain structures, with the prefrontal cortex being particularly noteworthy which is critical for complex cognitive functions.
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Along the path of its evolution, the human brain has undergone a transformative evolution, increasing in size and complexity. This remarkable growth, particularly in the prefrontal cortex, has equipped humans with unique cognitive abilities, including the power to simulate experiences before they occur. Such capabilities have profound implications for our understanding of happiness and decision-making.
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Similar ideas to The Evolutionary Significance of Brain Growth
Researchers have found that for much of human evolutionary history our brains kept growing. In fact, if you count from our last shared ancestors with chimpanzees six million years ago, the human brain size almost quadrupled. This happened thanks in part to the im...
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