Why Would ET Destroy Humans? Hint: Pollution

There's no subject more fertile for debate than hypothesizing about the nature of extraterrestrial beings. So, in a study carried out by researchers affiliated with NASA and Pennsylvania State University ("Would contact with extraterrestrials benefit or harm humanity? A scenario analysis"), several intelligent extraterrestrial encounter scenarios are examined. One of the scenarios is a sci-fi favorite: what if we encounter an alien race hell bent on destroying us? But this isn't mindless...Full Story
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