In the 1966 science fiction classic movie Fantastic Voyage, a submarine crew is miniaturised so it can squeeze inside a human body and travel to a hot spot where medical assistance is needed.
A team from the Massachusetts Institute of Technology (MIT), United States, has adapted this idea for real life, replacing the shrunken squad with specially-engineered Escherichia coli bacteria and pairing them with a suite of electronics that fit neatly inside an ingestible pill.
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