Alien civilizations may have explored Earth already
Alien civilizations may have explored the Milky Way and visited Earth already, new study claims
https://www.foxnews.com/science/alien-civilizations-explored-milky-way-earth-already
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According to a study published last month in The Astronomical Journal, extraterrestrial life might be taking its time to fully explore the galaxy, even using the movement of star systems to make this type of journey easier.
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