Re: AAT Theory

J. Moore (
Thu, 12 Oct 95 09:47:00 -0500 (Gerrit Hanenburg) writes:

>apes.Apes are bad quadrupeds especially on the long distance.
>However the study of Rodman and McHenry(1980) has shown that for a
>chimpanzee walking bipedally is no more and no less energetically expensive
>than walking quadrupedally.If selection for cursorial locomotion was
>significant then any slight variation in the direction of more efficient

It's strange to question empirical results but a simple
mechanics contradicts the conclusion that they'd be
equal. The only possibility is that the use of the arms
offsets the use of the muscles of the back but over long
distances it would make a difference.
Regards, Mark

It's not "strange" to question empirical results, but it's really
stupid to dismiss them in favor of unsupported armchair whimsy
(i.e. a "Hubeyism").

You should consider using the sorts of mathematical models that
paleoanthropologists use to rigorously test their theories.

Jim Moore (

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