Predatory bacterial swarm uses rippling motion to reach prey

Image shows swarm of M. xanthus bacteria (left) invading a colony of prey bacteria (right). The rippling pattern is the highly organized behavior of thousands of M. xanthus cells working in concert to digest the prey. Credit: John Kirby, University of Iowa Carver College of Medicine Like something from a horror movie, the swarm of bacteria ripples purposefully toward their prey, devours it and moves on.

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