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What kind of spaceships would the aliens use, if they want to observe us, or we if we want to observe them?

http://crisisofdemocracticstates.blogspot.fi/p/what-kind-of-spaceships-would-aliens.html


http://crisisofdemocracticstates.blogspot.fi/p/what-kind-of-spaceships-would-aliens.html
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