How Do Eyeless Worms Know To Avoid The Color Blue? – IFLScience

The roundworm Caenorhabditis elegans is among the most studied species on Earth, but it retains the capacity to surprise, or even astonish, scientists. The most recent discovery is the worms can avoid eating blue bacteria. That is wise since blue identifies the microorganisms as poisonous. It’s also completely weird because these worms lack not only eyes but cells for processing light.
C. elegans feeds on microorganisms in decomposing organic matter. Some of these microbes use chemical warfare to…

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