Fire ants use their bodies to build tall Eiffel Tower-like structures when they run into an obstacle in a fascinating show of teamwork and strength. New research using high-speed cameras has shown for the first time how the ants rapidly build these towers through trial and error. The finding could help scientists to develop modular robots that connect together to quickly build towers and bridges. Fire ants use their bodies to build tall, tower-like structures when they run into an obstacle in a fascinating show of teamwork and strength. Fire ants march as a group while searching for food or escaping a new area until they come to something blocking their way.