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A comment on There Probably Have Been Aliens. Parent comment

Re:There Probably Have Been Aliens by pklausler on Monday January 23, 2017 @12:46PM (#13464056)
Communication seems to be optional.
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Re:There Probably Have Been Aliens by jessaustin on Monday January 23, 2017 @12:52PM (#13464131)
It isn't obvious that communication by such "probes" would take place on a medium that we can currently sense. Which may be what you meant?
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