From the point of view of physics, there is no fundamental difference between biological life (cell based) and digital life (computer based). You can easily ima

From the point of view of physics, there is no fundamental difference between biological life (cell based) and digital life (computer based). You can easily imagine various scenarios in which computers wipe themselves out after taking over from us. Put another way, self-extinction is not something exclusive to biology. > would make the absence of technosignals self-evident The so called "grabby aliens" hypothesis suggests that after certain stages of advancement, live propagates at close to speed of light. So according to it we would see the technosignals just before contact/colonization/destruction.