You’ve probably seen the famous photos: long lines of tiny ants carrying leaf pieces many times their own size over the rainforest floor. Most people assume they’re hauling the leaves home to eat. They’re not. The leaves are food for something else.
Deep underground, in cool, ventilated chambers, leafcutter colonies grow a special fungus. The ants chew the leaves into a paste, layer it carefully like a compost garden, and feed it to the fungus. The fungus breaks down the leaves and grows tiny mushroom-like structures, and those are what the ants actually eat.
Leafcutter ants have been doing this for around 60 million years - long before humans started farming wheat about 12,000 years ago. The colonies even have built-in chemical-defense ants that produce antibiotics on their bodies to kill off harmful molds, keeping the fungus garden healthy. It’s a whole society built around farming.
