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Betty Cunningham <email@example.com> asked:
> How did the loss of the tails of the very early ancestors of Homo
> sapiens coincide with the steps from arborality >to> biped?
It happened first. All apes are tailless, and some are still
> If we could show that prePrimates lost a prehensile tail quickly we
> could perhaps infer that birds could.
I don't know of any evidence that human ancestors had a prehensile
tail (as opposed to the typical mammalian tail). The spider monkey's
prehensile tail is a derived feature.
All the best,
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