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where_are_they [2019-11-05 11:52] (current)
nik created
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 +==== Where Are They? ====
 +
 +    7.1 Extraterrestrial life is rare or non-existent
 +    7.2 No other intelligent species have arisen
 +    7.3 Intelligent alien species lack advanced technology
 +    7.4 Water world hypothesis
 +    7.5 It is the nature of intelligent life to destroy itself
 +    7.6 It is the nature of intelligent life to destroy others
 +    7.7 Periodic extinction by natural events
 +    7.8 Intelligent civilizations are too far apart in space or time
 +    7.9 Lack of resources to spread physically throughout the galaxy
 +    7.10 Lack of desire to live on planets
 +    7.11 It is cheaper to transfer information for exploration
 +    7.12 Human beings have not existed long enough
 +    7.13 We are not listening properly
 +    7.14 Civilizations broadcast detectable radio signals only for a brief period of time
 +    7.15 They tend to isolate themselves
 +    7.16 Colonization is not the norm
 +    7.17 Outcomes between all and nothing
 +    7.18 They are too alien
 +    7.19 Everyone is listening but no one is transmitting
 +    7.20 Earth is deliberately not contacted
 +    7.21 Earth is purposely isolated (planetarium hypothesis)
 +    7.22 It is dangerous to communicate
 +    7.23 They are here unacknowledged
 +
 +(via Fermi'​s Found poetry)