Siegel, 36 Alien Civilizations In The Milky Way? The Science Behind A Ridiculous Headline, Forbes (16 June 2020)

https://www.forbes.com/sites/startswithabang/2020/06/16/36-alien-civilizations-in-the-milky-way-the-science-behind-a-ridiculous-headline/

Authors. Siegel

Venue. Forbes

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• Interstellar Civilization Models