A civilization capable of building von Neumann probes would likely be much more advanced than ours. Chances are all life that we see in our solar system has be

A civilization capable of building von Neumann probes would likely be much more advanced than ours. Chances are all life that we see in our solar system has been planted by a passing von Neumann probe. The odds that this life develops into a technological civilization that builds more probes eventually are deemed high enough. Perhaps even more so once the technology has advanced enough to discover and decode the forefather's message in all DNA...