Now I Am Become Death, the Destroyer of Ants 

At an abandoned nuclear weapons bunker in Poland, a colony of wood ants lives underground in a cold, barren state of near-starvation. And yet, despite the incredibly harsh conditions, an enormously high death rate, and an utter lack of queens, this colony grows in size each year. Why? Because every year, thousands of worker ants fall down from a parent colony, and cannot climb back out. They join this sad, dystopian little ant world, and fight to survive. The whole thing is incredibly creepy, and more than a little disturbing. Enjoy!