After years of probing Planet Food Retail, Amazon's flying saucer has finally landed at Whole Foods headquarters in Austin/Texas.The traveller from deepest cyberspace must be serious, otherwise it wouldn't be offering $13.7bn for the privilege of buying the largest organic food retailer in the United States.The thing about flying saucers, of course, is that they can go wherever they want. So how about Germany and Old Europe, dear aliens?