I'm wrong! T'was the Flying Spaghetti Monster what did it. It provided all us H. Saps. with ears to flap when we fell off tall parapits. A curious side effect that in earlier years they served a different purpose and were larger than today and were a saving grace. Without them, we would be extinct!
Another side effect that was not anticipated those many years ago was that these flapping machines could hear in stereo. Without that development Bose and Dolby could not have made money!