![Expressive bald man with healthy skin shows ability to wiggle ears having fun on light blue background in room extreme closeup](https://cdn.mos.cms.futurecdn.net/szEVoFjJneYfCKQgfkZ4LE-320-80.gif)
'Vestigial' human ear-wiggling muscle actually flexes when we're straining to hear
A mechanism that activates specific muscles in our ears is a leftover from our evolutionary past, back when our ancestors depended more on their hearing for survival.