If you’ve had the privilege of tasting one you already know - a properly aged wine transforms not unlike how a caterpillar becomes a butterfly. On this edition of World Of Wine expert sommelier André Hueston Mack tastes a Heitz Cellar Cabernet Sauvignon at 5 different ages, from a recent 2016 vintage all the way back to a 1978, commenting on how and why the aging process affects every aspect of enjoying a wine.