Worst of flu season may be over. But you can still catch a chill. If you shake hands with lots of sick people, for example. Or don't keep sufficiently warm. Yes, your mother has told you, and you thought it was just an old wives' tale, but it wasn't.
Hearing begins with the ears, but it's more than the sum of sounds. We are able to recognize piano notes and experience music, understand speech in noisy surroundings and localize voice in 3D.