The gist: a fungus in Thailand infects the brains of carpenter ants and gets them to climb down from the comfy tree canopies they prefer to hang out in. They descend into the low leaves, and then clamp down hard on the leaf stem right before they die. Why? Because it's the perfect spot for the fungus to grow.
After the ant dies, the fungus continues to grow inside it. By dissecting victims, Hughes and colleagues found that the parasite converts the ant's innards into sugars that help the fungus grow. But it leaves the muscles controlling the mandibles intact to make sure the ant keeps its death grip on the leaf.
I, for one, welcome our new fungal overlords.