Are We Alone In The Universe?

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vendredi 27 mai 01:00 PM (1 heure 30 minutes)
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The galaxy is old. Very, very old. So old that if there were other spacefaring civilizations they should have visited every corner many times- yet we see no sign of aliens. Why? Are humans the only intelligence in the galaxy?
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TTO Publishing
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Board of Directror XCOR Aerospace
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The Royal Manticoran Navy
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