Lucy had neighbors: A review of African fossils: Confirms co-existence of multiple early human species during middle Pliocene. Key fossil discoveries over the last few decades in Africa indicate that multiple early human ancestor species lived at the same time more than 3 million years ago.

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Lucy had neighbors: A review of African fossils: Confirms co-existence of multiple early human species during middle Pliocene. Key fossil discoveries over the last few decades in Africa indicate that multiple early human ancestor species lived at the same time more than 3 million years ago.