This remarkable video segment from a Science channel show on ants came through Digg today:
The structure covers 538 square feet and travels 26 feet into the earth. In it’s construction, the colony moved 40 tons of soil. Billions of ant loads of soil were brought to the surface. Each load weighed four times as much as the worker ant, and in human terms, was carried over 1/2 mile to the surface.
In the video, the scientists pour ten tons of liquid concrete into the ant colony, wait several weeks for it to set then excavate it. Amazing! [YouTube via Digg]