In the UK they drank beer because the alcohol helped to sterilize it.
Actually, the water used was boiled during the beer making process and that's what sterilized it. The alcohol probably helped keep it that way.
When we walk through traffic and hear cars coming up on us, or know people's position in a room from the direction and magnitude of their voice. It's no surprise that someone lacking an important sense like sight will have much better developed echolocation ability.
That's hardly echo location. That's just stereo hearing. The best example I have of that is when I'm skiing - I process where people skiing behind me are by using 2 ears, so that I don't suddenly turn in front of them. No sound generation or echos required....
"You can't get very far in this world without your dossier being there first." -- Arthur Miller