Abstract
Today’s military aircraft typically use highly engineered “stealth” coatings that make them almost invisible to radar. Nature might seem an unlikely place to find such advanced technology, but one should never underestimate the ingenuity of evolution—moths developed their own form of stealth cloaking over 60 million years ago! That is before humans even walked the Earth! We discovered that the tiny scales on moth wings, which form fine dust when touched, provide stealth camouflage against the sonar used by their most dangerous foes—bats. By absorbing bats’ high-pitched calls, moths become nearly invisible to bats. Such stealth camouflage is a true superpower, as the coating on moth wings is light enough to allow flight, while still absorbing all the sounds bats make. The moths’ trick is that scales of various shapes work together to create a powerful super-absorber that is now inspiring humans to develop new sound-absorbing materials of our own.
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