The idea that we'd most likely encounter a colonising civilisation in the form of von Neumann probes seems reasonable. Imagine there was one (or even a few doz

The idea that we'd most likely encounter a colonising civilisation in the form of von Neumann probes seems reasonable. Imagine there was one (or even a few dozen) such probe currently occupying an asteroid somewhere in our solar system, slowly completing the millenia-long task of replicating itself. Would we have noticed yet?