n a finding that could provide controlled motion in futuristic nanomachines used for drug delivery, fuel cells, and other applications, researchers report that chemical signaling between synthetic microcapsules can trigger and direct movement of these capsules. Researchers theorize that synthetic capsules can communicate with each other by physically shuffling chemical signals from capsule to capsule, much like passing water through a fireman’s bucket brigade. Scientists recently suggested that this same signaling process also appears capable of sending cues to direct cell movement.