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Experts say extraterrestrial life may exist but is too scared of humans to come to Earth.
Biopsychologist Dr. Gordon Gallup claims, "If [alien life] exists, it may have found us by now and discovered that humans are dangerous, violent and ceaselessly engage in endless bloody conflicts and war." Dr. Gallup says for this reason, "aliens" are less inclined to engage with humans.
NASA has confirmed planets outside our solar system in 3,704 systems. In regards to whether intelligent life exists in these systems, Dr. Gallup says, "The history of biology on Earth makes it clear that intelligent, technologically sophisticated life is the exception rather than the rule."