The "flying dragon" might make a bit of watery mess as it does its job, and not all the water it squirts will go exactly where it's needed, but on the other hand it's a clever and fun way to aerially ...
TL;DR: Engineers at UC Berkeley developed the world's smallest wireless flying robot, less than 1cm in diameter and weighing 21mg. Powered and controlled by an external magnetic field, it can hover, ...
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