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Neither aliens nor alien spacecraft are known and proven to exist. In that sense, the answer is no. UFO means "unidentified flying object", not "alien spacecraft".
If there are aliens out there on other planets, and they see something they themselves cannot identify up in the air, then in that sense there is an alien UFO.
What else can I help you with?
Are ufos alien spaceships?
No.
What does UFOS have to defy gravity and no noise?
UFOs are simply things that not readily identified. They are not 'alien' spaceships. Nor do they defy gravity and there are many phenomena that do not make any noise.
How could an alien make it to your planet?
using UFOS
What are the release dates for Chasing UFOs - 2012 Alien Cowboys 1-3?
Chasing UFOs - 2012 Alien Cowboys 1-3 was released on: USA: 6 July 2012
What are the release dates for Alien Paranormal Bigfoot UFOs and the Men in Black - 2013?
Alien Paranormal Bigfoot UFOs and the Men in Black - 2013 was released on: USA: 1 June 2013
What are the release dates for Chasing UFOs - 2012 Alien Castaways 1-7?
Chasing UFOs - 2012 Alien Castaways 1-7 was released on: USA: 10 August 2012
Are UFOs real alien material?
There is no confirmed evidence in favour of this.
Do ufos really show proof of other life forms?
No. UFOs are proof that some people have seen things in the sky that they themselves cannot identify. That is what UFO means, not *alien spacecraft*. There has never been the slightest shred of evidence that *any* UFO was an alien spacecraft, so the answer to your question is no.
What are the release dates for Chasing UFOs - 2012 Alien Baby Farm 1-8?
Chasing UFOs - 2012 Alien Baby Farm 1-8 was released on: USA: 17 August 2012
What are the release dates for Unsealed Alien Files - 2012 II Soviet UFOs 2-5?
Unsealed Alien Files - 2012 II Soviet UFOs 2-5 was released on: USA: 30 September 2013
What are the release dates for Unsealed Alien Files - 2012 II Nazis and UFOs 1-10?
Unsealed Alien Files - 2012 II Nazis and UFOs 1-10 was released on: USA: 24 November 2012
What are the release dates for Nova - 1974 Kidnapped by UFOs The True Story of Alien Abductions 23-15?
Nova - 1974 Kidnapped by UFOs The True Story of Alien Abductions 23-15 was released on: USA: 27 February 1996
