Direction Changes of Insect Swarms - 2 views
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Swarms of insects or schools of fish can suddenly switch direction, seemingly at random. A research team now believes they understand why. In the August Physical Review E they describe experiments with locusts and their mathematical model of the swarm. The model suggests that tiny alignment errors between neighboring individual locusts within the swarm, which normally cancel each other, can accumulate over long times and eventually cause the entire swarm to suddenly move in a new direction.