> Suggests that the entire body consumes about 100W, and the brain itself 
> uses 20 - 40 W. (So... a pretty significant fraction, considering that the 
> human body is *not* a data processing device, primarily.) That's how much 
> energy it *uses*, I wonder how much of that ends up as heat?

Well there aren't too many options for "used energy" to be converted to. 
Maybe some is used to increase the kinetic energy of some blood, but I would 
say that almost all is converted to heat.

> The human brain doesn't work the same way a computer does. This isn't 
> exactly news. Indeed, this is why computers are useful in the first place! 
> But based on the number of switching elements in a computer vs those in 
> the brain, AFAIK the brain comes out rather favourably.

I guess the brain also makes even Windows ME look good for uptime records 
:-)

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