What do bats have to do with airplanes?

The bat's pathfinding principle inspired the invention of radar.

Scientists began to think about the phenomenon that bats can skillfully avoid obstacles when flying at night. After repeated experiments, they found that bats use ultrasonic waves to find their way with their mouths and ears. According to this principle, human beings invented radar and installed it on aircraft to improve the flight safety of aircraft at night or under complex meteorological conditions. Therefore, the relationship between bats and airplanes lies in that the bat's pathfinding principle inspired the invention of radar, thus improving the flying ability of airplanes.