If I recall correctly, Ardi had an opposable big toe and although he was bipedial, he couldn't have walked or run like us. If "Born to Run" is correct then Ardi

If I recall correctly, Ardi had an opposable big toe and although he was bipedial, he couldn't have walked or run like us. If "Born to Run" is correct then Ardi represents a point in our lineage after bipediality developed, but before we evolved to become runners.