Extraterrestrial beings monitoring Earth, might view changes in our atmosphere as symptomatic of a a self-destructing civilization– and take drastic action to keep us from becoming a more serious threat, according to a highly speculative scenario developed by scientists at NASA and Penn State University.
Shawn Domagal-Goldman of Nasa's Planetary Science Division and his colleagues developed scenarios that could unfold in the aftermath of a close encounter, to help humanity "prepare for actual contact".
Their report, Would Contact with Extraterrestrials Benefit or Harm Humanity? A Scenario Analysis,divides alien contacts into three broad categories: beneficial, neutral or harmful.
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