Brain Size and Complexity
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Description
Transcript: Humans are special. There is no escaping that fact. On this planet, humans are the only creatures that have evolved the capability to adapt to their environment and control their global environment. Humans have also developed the ability for abstract thought, for mathematics, and humans have figured out ways of understanding the entirety of the universe that they live in which is a fantastic achievement in only a few thousand years. But what at a genetic level is special about the large brains of humans? In one sense, the complexity is truly amazing. The human genome has information content in a four letter alphabet equivalent to a large book or an encyclopedia, some billions of bits of information. However, the human brain has ten to the twelve or a trillion cells, and these cells have ten to the power fifteen or a thousand trillion connections. These electrical-chemical connections and the networks they form are the basis for our intelligence. Ten to the power fifteen is a huge number, and it implies a large amount of complexity. Obeying Moore’s Law, if computers were to continue to develop as they have done, computers could potentially rival this level of connectivity and storage of information in about twenty years. We have no idea whether this means that humans can develop technology that becomes intelligent as well.
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