The NSA (National Security Agency) has declassified documents which could show that extraterrestrials have been trying to contact plant Earth on 29 occasions. The documents apparently show 29 messages were sent from outer space towards our planet. The NSA have been trying to decipher the messages to figure out what they say. If these documents are real and were sent out by an intelligent life form from outer space then it would be proof that we are definitely not alone in the universe.
You can read the documents here. NSA Messages
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