Silent protests
Northwestern University has developed an invisible drone that can fly at ultra-high speeds of up to 25 revolutions per second, making it invisible to the human eye and with a clarity ten times less than that of traditional quadcopters. Its design is based on the appearance of a "ghost spot" that seamlessly blends into the background, crafted in a way that aligns with human perception of motion rather than trying to mimic its surroundings. The team used artificial intelligence to generate and evaluate approximately 20,000 different configurations before arriving at a distinctive design featuring a single engine and propeller rotating in the same direction.
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