Discussion on question by Mark Gardner: Why do aliens who visit us have higher tech than us? Couldn't they wait for us to have it too?

Discussion on question by Mark Gardne

Imported from a comment discussion on http://worldbuilding.stackexchange.com/questions/70348/why-do-aliens-who-visit-us-have-higher-tech-than-us-couldnt-they-wait-for-us-t
3092d ago – Mołot
28
1
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