A group of American tourists have filmed what looks like a UFO next to a vortex of swirling clouds, above the CERN headquarters in Switzerland.
The strange footage was captured above the the Large Hadron Collider (LHC) and shows clouds swirling very fast above the nuclear research tunnels, followed by an eerie orb of light, which travels towards the vortex clouds.
The filmmaker, who could be heard expressing his amazement at the swirling clouds only moments earlier, fails to acknowledge the sudden appearance of this orb.
But zooms in on it as it reaches the very centre of the vortex and seemingly disappears into another dimension.
The video concludes moments later when the clouds suddenly follow suit and vanish alongside the ball of light.
Since appearing online the video has been viewed a quarter of a million times but its authenticity has been called into debate.
A number of YouTube users have suggested the UFO was created using CGI.
Other users disagreed with this theory however, with one writing: ‘It’s crazy how lost most of you are when it comes to this stuff.
‘CGI?? Really? Not even the best or most powerful computers could generate a visual like that!’
Built by the European Organization for Nuclear Research (CERN) between 1998 and 2008, the Large Hadron Collider is the largest and most powerful particle collider in the world.
The LHC enables physicist to collide particles at velocities approaching the speed of light, and was most notably used to discover the Higgs boson, or God particle, in 2012.
It is hoped that the information will eventually help us to understand how the universe began.