I'm not sure how subterranean borders work, but if a country includes the land underground, then every border of every country meets at a point a the center of the Earth. 

What's the highest number of countries whose borders meet at a single point?
I recently bought Ginger Kombucha for the first time in a reputable health food store. I'd never heard of it, but my doctor feels the probiotics will help my chronic digestive problem. Because of the strong taste, I only drank a small amount each day. I did this by pouring some out, not by drinking from the bottle. On the fifth day, it smelled and tasted so much like alcohol I was afraid it was rancid. I took it back to the store for advice. One clerk told me it was supposed to smell like that, just to use it for seven days and discard any remainder. Another clerk said it can't spoil, and as long as I keep it refrigerated it will last indefinitely. Can someone with experience please help me? It's expensive, so I don't want to throw it away if I don't have to, however I don't want to poison myself or use something that's no longer effective. Thank you!
