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Stream the full Scientific American Frontiers Season 15 Episode 9 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.

Scientific American Frontiers: Replacement synthetic senses for people are now a reality. Children as young as 12 months are already getting artificial hearing - while the first trials of electronic retinas for the blind are just beginning.