...the old concept of the Von Neumann machine is back. The tabloids are saying we've been invaded by nanoprobes.
What scientists are actually saying is that the use of nanoprobe swarms for deep space observation is feasible. Nanoprobes would, of course, use very little fuel and could be sent to "candidate" systems to observe and record data without being detected by any local civilizations.
(Which given we can't be trusted not to blow things up...)
But that doesn't mean they're out there.
Or does it?
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