7 Blue vs. Green Milk We never did get that glass of wine. Preston ended up having to work on a grant application. Every night after class, he made a quick exit and headed to Bologna to confer with colleagues at the university. At least that’s what he said he was doing. Who knows what he was really getting up to. Most likely he regretted the conversation we had after the food fight. Some things are probably better left unsaid, like talking about your exes and how they betrayed you. On Friday morning, Maria claps her hands together to get our attention. “I have a special treat for you today. As you know, Ravenna is home to eight UNESCO World Heritage sites. Professor Whitaker has kindly agreed to give us a guided tour of two of them this afternoon—the Basilica of San Vitale and the Maus