Re: Lilliputian Posthumians

John Clark (
Thu, 22 Oct 1998 12:40:53 -0400

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Joe E. Dees <> on October 21, 1998 Wrote:

>Each neuron has up to 40,000 connections with other neurons, and
>there are more than 30 billion (not million) of them in a human brain
>weighing approximately 3 1/2 pounds. As complex and miniaturized
>as it already is, and considering that the interaction of genetics and
>experience has endowed each brain with a unique (although similar)
>connection pattern, the difficulties involved in further shrinking them
>are daunting, to say the least.

Difficult yes, impossible no. Hans Moravec figures it would take 10^13 calculations per second to emulate a human brain. To build one of Drexler's nano computers that could perform 10 ^13 calculations per second you'd need about half an ounce of matter, mostly of carbon, and about 15 watts of energy.

John K Clark

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