Since the Judgment of Paris in 1976 we have known that California makes world class wine that competes with the best of France, but can they age as well as the great vineyards of Bordeaux or Burgundy? When fine wine matures it goes through a remarkable transformation increasing its complexity and depth, however only a miniscule proportion of the wines produced are capable of benefiting from extended bottle age. We put the great wines of California to the test by tasting eight vintage bottles from the best producers in California.