One iconic feature of the batsuit that makes Batman easily recognizable may soon give the the Dark Knight’s go-to sonar technology a real-world upgrade — bat-like ears. Only, these ears would not just ...

Humans, and most other mammals, have just four muscles joining their ears to their head. Bats have more than 20, and they use them to execute a precise series of wiggles, swivels, and twitches. "In ...