When a massive asteroid wiped out the dinosaurs, ants began farming fungi CNNAsteroid impact may have turned ants into fungus farmers 66 million years ago ScienceAnts Mastered Agriculture Millions of Years Before Humans NewsweekGenetic database shows some fungal crops became completely reliant on ants 27 million years ago Phys.orgAnts Farmed Fungi in the Wake of Dinosaurs’ Demise 66 Million Years Ago Smithsonian Magazine