User talk:2601:601:9B00:3444:15B6:D902:AE40:B419

August 2019
Please do not add or change content, as you did at Fermi paradox, without citing a reliable source. Please review the guidelines at Citing sources and take this opportunity to add references to the article. Thank you. David J Johnson (talk) 12:12, 2 August 2019 (UTC)
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