What happens to opened wine — and how to know when it's gone bad

You might have an opened bottle of wine from a recent celebration and wonder, "Is this still good?"

Wine that's been open for too long may not make you sick — but it won't taste the way it was intended, according to the "Wine Country" blog.

Leaving wine open for too long can strip its brightness, dull its aromas and mute its flavors, experts say.

RED WINE OR WHITE WINE? DOCTOR REVEALS THE HEALTHIER CHOICE, AS WELL AS CAUTIONARY DETAILS

In the worst cases, opened wine can develop a sour, vinegary taste.