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Flying Microchips the Size of a Sand Grain Could Be Used for Population Surveillance



The winged microchip fliers can gather information about their surroundings and don't have a motor. (Shutterstock)
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Winged microchips developed by engineers at Northwestern University are being billed as the smallest-ever human-made flying structures. They are as small as a grain of sand and can be carried by the wind as they monitors such things as pollution levels or the spread of airborne diseases.

Read More at NPR

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