The WORLD from A to Z returns with a report on a ceasefire between Israel and Hezbollah: What is the significance of the agreement? We're explaining what's meant by Seasonal Affective Disorder and offering tips on how to deal with it. We're quizzing you on a famous Corsican and detailing historic events from three different continents. And we're telling you why some researchers are excited about how they can build on their knowledge of termites.