A fascinating UFO photo taken by two hikers in the Scottish Highlands over 30 years ago and considered lost, has been uncovered.
The so-called "Calvine Photograph" appears to show a massive diamond-shaped object in the sky and what looks like a Harrier jet in the distance.
Described by some as the "world's best" UFO image, it was found after years of research by academic and journalist Dr David Clarke.
The photo, along with five more, were snapped on August 4, 1990, by two hikers on a hillside near Calvine, about 35 miles north-west of Perth in Scotland.
They were handed to Scotland's Daily Record newspaper who then gave them to the Ministry of Defence (MoD).
For reasons unknown, the story was never published and nothing more was heard from the MoD.
This led to the modern myth of the "Calvine Photograph" - with the images never being seen by the public, until now.
At the time, the hikers - whose identities are not known - said they watched the metallic object - about 100ft long - hovering with a low hum for about 10 minutes and saw the fighter jets pass in the distance.
The object is then said to have quickly shot up into the sky before vanishing.
Dr Clarke - who has worked as a curator for the MoD UFO files project at The National Archives and is an an associate professor from Sheffield Hallam University - managed to find the photo after contacting former RAF press officer Craig Lindsay, The Sun reports.
Mr Lindsay had kept a copy of the original photograph as he was the one liaising between the press and the MoD when the original story was looked into in 1990.
He still had the original envelope from the Daily Record - and inside was one of the Calvine photos.
Mr Lindsay agreed to hand it over to Dr Clarke and Vinnie Adams, from campaign group UAP Media UK, and it has now been filed in the archives at Sheffield Hallam University.
Mr Adams told The Sun Online: "It’s been a privilege to work on this case with such a dedicated team of researchers.
"After 32 years, and an intensive investigation, it feels good to be able to show this elusive photograph to the world."
He urged anyone with any information on the identity of the hikers or the case to come forward.
Nick Pope, who investigated UFOs for the MoD in the 1990s, wrote about the photo in his 1996 book Open Skies, Closed Minds and said it was once on the walls of the MoD's 'UFO office'.
He claimed the UK asked the US if the photo was of an experimental aircraft.
The image was then removed from the wall and not seen again.
For reasons not known, the MoD are keeping the case about the sighting classified until 2072.
Although mystery surrounds the image, some believe it was, like the MoD had apparently suspected, an experimental US aircraft, possibly The Aurora.
It has never been confirmed if The Aurora actually existed but some believe it was a hypersonic spy plane capable of super fast speeds.
A number of witnesses in the UK claimed to have seen angular flying objects in the late 80s and early 90s.
Graeme Rendall, from UAP Media UK, said: "We may not be any closer knowing exactly what the object seen over Calvine in August 1990 was, or who it belonged to, but an important piece of the puzzle has dropped into place due to diligent research."
