A 1940s war photo has left some people claiming it proved time travel is real.
The picture doesn't appear to seem odd at first - showing a rather busy street in Reykjavik, Iceland, with a smartly dressed man standing on a street corner.
But eagle-eyed history lovers claim the man is holding a mobile phone - a device which only came about 30 years later from the time of the picture.
The first handheld mobile phone was the Motorola DynaTAC 8000X, which hit the market in 1973
Taken in the capital of Iceland in 1953, the image showed a rather crowded street full of locals and US soldiers during the Second World War.
A group of GIs were pictured standing in front of a taxi station.
But it's not the busyness of the street that has caught many people's eyes.
It is instead a seemingly normal-looking man dressed in a light trench coat who is leaning up against a shop window.
He appears to stare directly into the camera as others are completely oblivious to the picture being taken.
And the mysterious chap has his hand to his ear - and some on social media suspect he may be holding a mobile phone.
Some have claimed he's a time-traveller who travelled back with the electronic device- which had not been invented yet during those times.
The photograph sparked an intense discussion on Facebook, after being posted on the Facebook group Gamlar ljósmyndir — meaning “old photographs” in Icelandic — by Kristjan Hoffmann.
In his 2016 post, Mr Hoffman said the man was “far ahead in technology”.
One even used a very British sci-fi phenomena to explain what might be happening in the old shot from WWII.
“Dr. Who,” wrote Karolina Petursdottir.
Another commenter turned to humour, joking that the photograph was proof that Icelanders had "already invented the mobile phone way before anyone else”.
However some failed to believe the truth in time travelling, and simply thought he was doing something rather normal with his hand to his ear.
“He’s checking if the watch works,” wrote one Facebook group member.
while others believed he was simply picking at his ear.
Another suggestion offered was that he was using his tobacco pipe to scratch the back of his ear.
Allied forces took over Iceland in 1940, with the British Prime Minister at the time, Winston Churchill, who feared that Adolf Hitler’s Nazi Germany would invade and take control of the Northern Atlantic seas.
US troops agreed to defend Iceland, in place of British and Canadian troops, in 1941.
By 1943, when the photo is said to have been taken, about 30,000 Allied troops were said to have been based in Iceland.
