I'm keenly aware that I know next to nothing about biology, but I was wondering about something:<p>If I understand this article correctly, the cicadas that were infected during the last cycle can't impregnate or get impregnated (because, as the article puts it, their butts fall off). However, they can and do infect other cicadas. Shouldn't this this result in every cicada that can get infected getting infected eventually, at which point the population dies off after the next cycle produces no baby cicadas?<p>If so, is the ideas that this is a new fungus, or new behavior, not something that's been around and been at some kind of equilibrium for 1000 years or something?