You see U.F.O.'s everyday. U.F.O.s aren't necisarily alien ships. Anybody aerial object that you are not familiar with could be classified as a U.F.O.
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There is no definitive answer because there is no definitive proof that they exit. UNIDENTIFIED Flying Object (or UFOs for short) are as the name suggests 'unidentified'; if one knew what they where or where to find them they would not remain 'unidentified'. Many people believe that they are natural phenomena rather than objects from outside the domain of Earth.
No way
astrobiology
Penguins are found in cards and in UFOs.
Please see the Related Links.
There are many sites online with articles and information on UFOs; too many to list here. To get you started, I have posted the results page of articles you can read concerning UFOs below in Related Links.
If and when they come, we will find out. Until then, they are still unidentified.
Aliens, by definition, primarily reside in space or in the planets inside of space. Should you want to find UFOs, the best bet is to situate yourself by some sort of experimental aircraft base and hide from yourself the fact that the UFOs you see are likely experimental aircraft.
Try searching facts on ufo's on google
Where humans and alcohol are, UFOs will be.
There are none in existence. You can only find images that people claim to be aliens or UFOs. So far, there has never been any evidence to support their claims.
the correct answer is UFOs thanks for asking
There have been reports of sightings of white UFOs.