Last week, as I was pulling weeds in my flowerbeds (as always, amazed by the tenacity of dandelions and crab grass), I reached under a shrub to pull a particularly stubborn root. I felt a sting and drew back my hand to see dozens of fire ants scatter. I had disturbed their mound, and the ground was alive with tiny workers scrambling to rebuild their fortress. Somehow, those many individual ants worked as one in response to the disaster. Read more . . .