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Sirius7237 wrote:

> Aine wrote:
>
> > Take walking upright as an example. At what point and by what
> > mechanism did it become automatic and instinctive behavior
> > instead of a "See, look what I can do!" thing?
>
> I would think not so much instinctive behavior as a purely
> physiological mechanism that allowed selective advantage as
> climate changed and our ancestors moved from living in trees to
> open savannah?
>
> Pretty soon, everyone was doing it!
>
> I'm not sure if you've read anything on the controversy over
> bipedalism leading to bigger brains or the other way around?
>
> [www.pbs.org]
>

Yes, and I have my doubts about it being a causal factor at all. IMO it was the introduction of high amounts of fatty acids via cooked meats that led to a bigger brain.

Bipedalism may well be a purely physiological mechanism. But what about language? IMO that's as instinctive as walking upright and may well date back just as long. (I have a really hard time believing no one spoke until 40,000 years ago. To me, the whole idea is ludicrous.)



In the spring, at the end of the day, you should smell like earth. ~ Margaret Atwood

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