It's impossible to know, because the universe is vast, and our technology and intelligence can only do so much, but just for the fun of it, how long do you think it will be before we find life in the universe?
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We already have. There is martian bacteria on Mars that has been discovered by Opportunity and Spirit in 2005.
Some people also believe that we are already in contact and in this generation these aliens will be revealed.
Some people also believe that we are already in contact and in this generation these aliens will be revealed.
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Extraterrestrial life are mostly rumors. First you need to proove its presence then we think about having contact.
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We are already in contact, and this fact should be revealed within your lifetime.