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There likely aren't many occasions when you'd want to swallow a tiny robot. But what if such an ingestible bot could be put to work inside your body, targeting a foreign object or patching up an internal wound, before decomposing without a trace?
The Harvard Microrobotics Lab that developed the insect-sized drone has given it the ability to perch. This allows it to conserve energy. Small drones have been hampered by power supply issues in the past.