Camels are called the "ships of the desert" because they are well-adapted to traveling long distances in hot, dry climates. They have large humps on their backs that store fat, which they can use for energy when food and water are scarce. They also have thick fur that helps to insulate them from the heat and sand. Camels are also very efficient at conserving water, and they can drink up to 200 liters of water at a time.