Re: An alternative to ST and AAT
chessonp@aol.com
9 Dec 1996 19:42:02 GMT
In article <850084901snz@crowleyp.demon.co.uk>, Paul@crowleyp.demon.co.uk
(Paul Crowley) writes:
>In the first form of locomotion its trunk is horizontal; in
>the second it's vertical. It cannot have a trunk at 45 degrees
>or at angles other than ~0 or ~90 degrees. It cannot move
>gradually from one to the other. So at the initial stage
>we have to have a quadrupedal animal adopting a bipedal stance
>-- as we see with chimps. The only way it can progress is
>to adopt this stance more and more often, going from 10% of
>locomotion time to 20% to 30% and so on. As it does this,
>it will get better and (over generations) adapt. Its spine
>will adapt to the vertical posture; its pelvis will re-
>orientate; its legs will get straighter and its knees will
>develop locking mechanisms. But each of these changes will
>reduce its ability to progress quadrupedally.
>
>
Hello Lamark!
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