Termites are renowned architects whose mounds have inspired many building designs around the world. But did you know how termites build their mud castles? A new study has tried to understand how termites use boluses -- a combination of mud and saliva acting as bricks -- to build their mounds. The study also throws light on the properties of materials the termites prefer to use to build mounds and discusses reasons behind the same. This study, the researchers claim, is a first towards understand the unique procedure followed by nature’s best architects in building some of the finest castles.