Is Alien Exist?

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Last night i watch a show that discuss about alien, ET, etc. i feel the discussion is ridiculous because they discussing about something that they can`t prove the existence. i tought it (alien, ET, etc) just a fiction. but when i see them, they seems talking about it seriously. but i don`t say now i believe in alien. i just feel this is kinda interesting but weird at the same time. in your opinion, is such a things exist. ps: don`t take this discussion too seriously okay