Every day we see animals migrating through the air, across plains, and in the oceans, in beautifully coordinated patterns; starlings flock together in the thousands while sardines swim together in enormous shoals. These social behaviors are important in allowing animals to socialize, avoid predators, and find refuge and food. But what about smaller organisms? Although more difficult to visualize, microorganisms can perform these coordinated behaviors as well. As is true for birds and fish, figuring out how and why bacterial cells communicate to organize their movements will help understand the behavior of bacteria in the environment.
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