The Economist -
31 Aug 2017 18:51

Set spasers to "kill" IT IS more than 50 years since "Fantastic Voyage" hit the silver screen. The film's premise, shrinking a submarine and her crew of doctors to the point where they can travel through a patient's bloodstream to repair damage in situ, though entertaining, remains as absurd as it was in 1966. Not so the idea that therapeutic machines small enough to circulate in this way might be built. Indeed, perhaps inspired by the film, several such efforts have been made. Some are drug-del...
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