No ant knows the shortest route to the food. The shortest route is something that emerges: whoever takes it gets back sooner and lays more pheromone, the colony piles onto that line, and the roundabout branches simply evaporate. How fast the pheromone evaporates and how rich the food source is decide how strong the trail grows, which is to say how fast that positive feedback loop runs itself. Under alarm the colony flips role by role in seconds, soldiers pouring out of the entrance while foragers stop working: a superorganism reacting as one body.
No ant knows the shortest route to the food. The shortest route is something that emerges: whoever takes it gets back sooner and lays more pheromone, the colony piles onto that line, and the roundabout branches simply evaporate. How fast the pheromone evaporates and how rich the food source is decide how strong the trail grows, which is to say how fast that positive feedback loop runs itself. Under alarm the colony flips role by role in seconds, soldiers pouring out of the entrance while foragers stop working: a superorganism reacting as one body.
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