Detail of the Marks on a Fossilized Rib Bone (IMAGE)

Emory Health Sciences

Detail of the Marks on a Fossilized Rib Bone

Caption

This is a detail of the marks on a fossilized rib bone, one of the two controversial bones. "The best match we have for the marks, using currently available data, would still be butchery with stone tools," says Emory University anthropologist Jessica Thompson.

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Photo by Zeresenay Alemseged.

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