"If there is alien life in the galaxy, why haven't we found it?"
If there is alien life in our solar system, how would we have found it?
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Or. if they were advanced enough, why haven't they found or reached out to us?
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If it is sufficiently advanced for it to recognize us and not vice-versa: because we're too dumb to sustain its interest.
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Other reason: life on Earth evolved along parameters specific to our planet. Other life may be too different to even recognize.
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by this clear communication would be close to impossible . The E.T.s would ignore us then cause a misunderstanding.
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. We can't even communicate accurately with birds & dogs. Our language adaptations are very species-specific.