Another example, I've seen work where it was proposed to essentially stick a small Geiger counter in the pleasure center of the brain of a flying cockroach. Id

Another example, I've seen work where it was proposed to essentially stick a small Geiger counter in the pleasure center of the brain of a flying cockroach. Idea being that you release them and they'd swarm to someone smuggling nuclear material. I think some actual demonstrations were done iirc. Can't find the abstract for it right now