NASA has found evidence of alien life but has covered it up to avoid public panic.
NASA has discovered alien artifacts on the Moon or Mars but has kept it secret to prevent global chaos.
NASA has intercepted alien signals but has not made them public to prevent widespread panic and social upheaval.
NASA's SETI (Search for Extraterrestrial Intelligence) program has been actively searching for signs of intelligent life in the universe for decades.
NASA's research and findings on space exploration, including the search for extraterrestrial life, are regularly published and made public.
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