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Good for science, bad for your nightmares: Moths that drive robots


A group of silkworm moths, coached by researchers at the University of Tokyo, just took a driving test. Instead of their moms' old minivans, however, they were given another machine: a robot. 

The idea of all this wasn't so much to test the robomoths' driving capabilities -- moths are notoriously aggressive drivers, after all, and their tendency to leave their turn signals on for miles on end is well-documented -- but rather to test the creatures' ingrained tracking behaviors. The idea from there was to (potentially) apply those natural impulses to man-made robots. Moths track smells effortlessly; for a robot, though, that kind of impulse is difficult to engineer. But an autonomous device that is capable of sensing smells and then tracking them to their sources -- say, to identify environmental spills and leaks -- could prove hugely valuable.

So researchers made a makeshift robot with a styrofoam ball that functions, effectively, like a trackball mouse. They then attached moths to the device (this was, for the moths, the ostensibly the worst part of the test), converting the robot into a comically large entomological exoskeleton. 

The moths were then let loose.

Their destination? Lady moths. Or, in this case, a female sex pheromone that acted as a fairly cruel simulation of an actual lady moth -- a smell whose source was located at the opposite end of a simple obstacle course. As the moth walked toward the pheromone, the foam ball rolled accordingly, and sensors -- attached to the robot's drive motors -- fired off signals according to those movements.

(Image via jctabb/

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