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Stream the full Naked Science Season 4 Episode 5 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.

Naked Science: It has long been said that the first Americans were hunters who arrived on the continent some 13,500 years ago via the Bering land bridge. This idea is now being challenged by scientists using modern, high-tech forensics to arrive at a new conclusion; the first residents may have arrived thousands of years earlier and had a more developed grasp of engineering that we had thought possible.