If extraterrestrials do exist, they sure have a good way of hiding themselves. Perhaps, it’s their absurdly advanced stealth technology that’s to blame for our searches for life outside Earth returning fruitless.
But if life evolves on a trajectory towards intelligent and technological civilizations, then where is everybody?
Astrobiologists from Australian National Univ. have posited that potential extraterrestrials are silent because they’re already dead, and most likely went extinct during a very primitive state of life.
Their research was published in Astrobiology.
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