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> Primates all
>climb quadrapedally.
>Remember these exceptions,
>Matt Troutman

Yes, but remember that the ultimate primate bipedalism (represented by
ourselves) originated in trees, as suported by the latest research on
hominids and australopithecines in general. The afarensis had recurved
phalanx and oposable big toes and were facultative erect walkers.
I think all compulsory bipedal animals' evolution has passed through an
arboreal stage.

Luis Rey

Visit my website on http://www.ndirect.co.uk/~luisrey