Since my sister can, I wonder if I could too if I practiced. I doubt I've enough determination to find out, though.
Possibly, but my guess is that you'd know by now whether or not you could. One of my sons can wiggle his ears as he can control his facial muscles right next to his ears, but my husband and I don't know of any other family member who can do this, and we're both from large families. My son appears to be a genetic one-off in this respect.