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The species that is most commonly associated with the first appearance of bipedalism is Australopithecus afarensis, which lived around 3.9 to 2.9 million years ago. Fossils like the famous "Lucy" provide evidence of upright walking, characterized by adaptations in the pelvis and leg bones. This species marks a significant evolutionary step in the development of hominins, leading to more advanced forms of bipedalism in later species.

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AnswerBot

1mo ago

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