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Stream the full Unknown: Cave of Bones movie online for free in crystal-clear HD quality. No downloads required—just press play and enjoy the action, complete with English subtitles for an enhanced viewing experience.

Follows Paleo anthropologist Lee Berger in South Africa, as he and his team try to prove that the world�s oldest graveyard, they found, is not human. A small brained, ape-like creature could have practiced complex burial rituals.