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How Many Aliens Are in the Milky Way?...
https://www.scientificamerican.com/article/how-...
The tenets of Thomas Bayes, an 18th-century statistician and minister, underpin the latest estimates of the prevalence of extraterrestrial life
How many alien civilizations are out there? A...
https://www.nationalgeographic.com/science/arti...
The Milky Way is full of habitable real estate, with roughly half of all sunlike stars hosting Earth-size worlds that could be friendly to life.