A study by Italian researchers reveals that the grapes used for wine in Europe, including varieties like sauvignon blanc and cabernet, were initially domesticated in the South Caucasus region, now including Azerbaijan, Armenia, and Georgia, around 4,000 years ago. This finding is based on a genetic analysis of a large number of grape samples. The researchers suggest that these grapes spread westward into Europe, interbreeding with native varieties to survive the colder climates, which led to the development of the diverse wine grape varieties known today.