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Re: Question about hominids (from 'Ardi')
Birds have both knees and ankles, like all limbed vertebrates that don't
have drastically reduced limbs (such as... pythons). The knee points
forward, and the ankle points backward. Check out the next bird that
lands on your dinner table; it looks a lot more like all other dinosaurs
than you seem to think.
A bipedal basal hominin was (on the ground) probably less agile and
maybe slower than a quadrupedal (though plantigrade) baboon. I think
that's what was meant.
I don't think extant non-human primates can lock their knees like us,
We can lock our knees??? What do you mean?