Master of Wine Jasper Morris, author of "Inside Burgundy" (2010), says that in his opinion the two most plausible explanations are faulty corks and global warming.

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S., the resident director of wine education and a master sommelier, who came bounding into the lounge one evening with a wire basket of empty bottles (from an outdoor tasting) and a waiter's corkscrew wagging from his back pocket.

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But for a master winemaker like Biyela, wine is much more than that.

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