The Ministry of Defence has opened classified 'UFO' files from 1978 to 2002. The files contained sightings of UFOs and aliens as reported by the public.
"The Ministry of Defence does not deny that there are strange things to see in the sky," they report. However it goes on to say that there are: "adequate material explanations for these."
Take a look at some of the 'evidence' then have your say.
An image from video footage taken 14 November 1999 by a Beijing resident shows an unidentified flying object (UFO) hovering over Beijing city centre late in the afternoon.
(Photo credit should read AFP/Getty Images)
Find more on An image from video footage taken 14 November 1999
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