Tandem!

Under the sun, moving quietly and patiently, the ants, with their food, take small pace forwardly back to home; meanwhile they take small pace from home to search the food. During this long way, they walk one by one, they sniff to exchange information whenever they meet, and finally, they take a good amount of food back home. They work independently while at the same time they also cooperate in harmony to keep the route back home.

Such An Amazing Tandem in Nature!