A Japanese newspaper reports that only twenty ants snaked into a device box of the automatic transport control system of the West Japan Railway Corporation and made an accident on a railway. What were they doing in such an oily place? I have no idea which kind of chemical compound seduced them to the box. Maybe they scouted a new location for the movement of their colony. I guess that place was so clean that they confused it with a good location to live in. Sometimes the custom of high-hygiene control in Japan makes such a problem. I don't know it is the exact reason for them to intrude in the place.