It sounds like the plot of the world's tiniest horror movie: deep in the Ecuadorian Amazon, a newly discovered species of wasp transforms a 'social' spider into a zombie that abandons its colony to do the wasp's bidding. That's the gruesome, real-life discovery by researchers who detail the manipulative relationship between a new Zatypota species wasp and a social Anelosimus eximius spider in a new study.