It's not a bird or a plane, it is actually a winged microchip that is as small as a grain of sand and can be carried by the wind as it monitors things like pollution levels or the spread of airborne diseases. These tiny micro-fliers were developed by engineers at Northwestern University and were the subject of an article published this week and are being called the smallest human-made flying structures, ever!
These microfliers are bioresorbable and can dissolve and disappear!
Photo: Getty Images