Doe Quote by Mikhail Gorbachev

But the UFO phenomenon simply does not behave like extraterrestrial visitors. It actually molds itself in order to fit a given culture.

— John Ankerberg

UFO's are as real as the airplanes flying overhead.

— Paul Hellyer

As a full-time, and serious-minded, UFO investigator, I strongly side with the proponents. It seems indisputable that the phenomenon is real, and that it…

— Peter Davenport

It is my conclusion that UFOs do exist, are very real, and are spaceships from another or more than one solar system. They are…

— Hermann Oberth

Of course UFOs are real-and they are interplanetary…The cumulative evidence for the existence of UFOs is quite overwhelming and I accept the fact of…

— Hugh Dowding, 1st Baron Dowding

The UFOs do not seem to exist as tangible, manufactured objects. They do not conform to the accepted natural laws of our environment. They…

— John A. Keel

I am convinced that UFOs exist because I've seen one...

— Jimmy Carter

Among the hundreds of so-called "UFO reports" each year, a sizable fraction of those clearly observed by reputable witnesses remain unexplained-and difficult to explain…

— Richard Hall

It is an understatement to say that the time has arrived for a serious and open international dialogue regarding the possibility of future interplanetary…

— Steven M. Greer

I am completely convinced that UFOs have an out-of-world basis.

— Walter Riedel

I have taken special interest in these accounts [of UFOs].. I think there may be substance to some of these reports... I think we…

— Gerald R. Ford

For years I've been stressing with regard to UFOs that extraordinary claims require extraordinary evidence.

— Carl Sagan