An entire country's wine industry was selling the wrong grape for over a century, and didn't find out until a DNA test said so.

A name on a wine label is a legal claim, not a marketing flourish. Here is what it actually promises, from 1907 French riots to the loophole that created Super Tuscans.

Old World bottles look like they are hiding something. They are — it is just hidden in the label, in plain sight, in French.