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New laboratory experiments bolster the longstanding theory that marine bacteria light up to get themselves a free ride to other parts of the ocean in the digestive tracts of larger beasts. When the animal pops out a glowing fecal pellet, the bacteria become visible again, signaling another creature to eat them and keep the microbes on the move. The guts of shrimp and other small marine creatures may serve as a highway for spreading bacterial pathogens throughout the sea, like the one that causes cholera. [Source: ScienceNews]
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