@interestingengineering: French startup Tornyol — backed by Y Combinator — has announced the first air-to-air kill of a flying insect by an autonomous micro-drone, taking down a moth in midflight. The 40-gram drone hunts using sonar: it fires ultrasonic pulses and listens with an array of tiny microphones, reading the Doppler signature of an insect's wingbeats to tell a mosquito from a bee. Instead of chemicals, the drone itself is the weapon — it rams straight into the target. #Tornyol #Drones #Mosquitoes #YCombinator #Sonar