Re: is our brain part of evolution?

Bryant (
15 Oct 1996 10:41:19 -0600

In article <>,
ITAY <> wrote:

>Our brain as it is today could not (at least that iswhat i think)
>could not become as comlex as it is just of evolution, why?
>if we watch the western culther, but mostly african or indian, we
>can well see that the brain was used in last 10000-2000 years only
>for simple tasks, i mean not by all people but by most of them,
>so how come that the evuolution made a brain as big as that to become
>so big, if only 10%-30% were used ?

There is not evidence, so far as I am aware, that we only use, or that
our ancestors only used, 10 to 30% of the most metabolically expensive
tissue we possess.

Spatial tasks, social interactions, language acquisition, etc., were well
represented selective pressures in ancestral environments.

>so either our brain is a freak of nature, or a made by god? or maby we
>werent part of the evolution and have been put here by other?
>is that a stupid theroy? i realy want to know...

It's not a theory, it's a hypothesis. A very, very weak one that doesn't
account for the facts and is based upon assertions which I do not think
correlate with what is known about our ancestors' lives.