other grape varieties. It is the likely place of origin of the vine, and producers across the globe have invested heavily in trying to reproduce the structure and complexity of Bordeaux wines. While the "Bordeaux blend" of Cabernet Sauvignon, Cabernet Franc and Merlot created the earliest examples of acclaimed Cabernet Sauvignon wine, Cabernet Sauvignon was first blended in Bordeaux with Syrah (from the Northern Rhone), a pairing that is widely seen in Australia and some vin de pays wines from the Languedoc. The decision to first start blending Cabernet Sauvignon was partly derived from financial necessity. The sometimes temperamental and unpredictable climate of Bordeaux during the "Little Ice Age" did not guarantee a successful harvest every year; producers had to insure themselves against the risk of losing an entire vintage by planting a variety of grapes. Over time it was discovered that the unique characteristics of each grape variety could complement each other and enhance the quality of the wine. Cabernet Sauvignon added structure, acidity, tannins and aging potential as a base or backbone of the wine. By itself, particularly when harvested at less than ideal ripeness, it can lack a sense of fruit or "fleshiness" on the palate which can be compensated by adding the rounder flavours of Merlot. Cabernet franc can add more aromas to the bouquet and more fruitiness. In the lighter soils of the Margaux region, Cabernet-based wines can lack colour, which can be achieved by blending in Petit Verdot. Malbec, used today mostly in Fronsac, can add other fruit and floral aromas. DNA evidence has shown Cabernet Sauvignon is the result of crossing two other Bordeaux grape varieties— Cabernet franc and Sauvignon blanc— which has led grapevine historians, or ampelographers, to believe that the grape originated in Bordeaux. Early records indicate that the grape was widespread in the Médoc region during the 18th century. The loose berry clusters and thick skins of the grape provided an excellent resistance to rot in the sometimes wet maritime climate of Bordeaux. The grape continued to grow in popularity until the Powdery mildew epidemic of 1852 exposed Cabernet Sauvignon's sensitivity to that grape disease. With vineyards severely ravaged or lost, many Bordeaux wine growers turned to Merlot, increasing its plantings to where it soon became the most widely planted grape in Bordeaux. As the region's winemakers started to understand better the area's terroir and how the different grape varieties