When you see ants running around a hill of dirt, they may not look like they are doing anything important; but each ant that lives in the hill has a special job. Some ants clean the nest or dig new tunnels. Others bring in food or store seeds to eat later. And in each ant city there is a queen ant who is busy laying eggs. In the miles of tunnels and hundreds of rooms underground, these industrious insects work together to keep their ant city alive.