During World War II in 1943, US forces in Reykjavik, Iceland, saw a strange figure.
His hand was close to his ear, like he was on a cell phone, which didn’t exist at the time, but he wasn’t wearing a military outfit. He was wearing a light-colored trench coat.
Many people on social media came up with theories about what the man could have been from the strange sighting.
Some thought he might be from the future and was stuck in an unknown time period.
As part of this interesting study into this unknown person from the past, new, detailed photos have been put online.
Even though a lot of experts have looked over the information, there is still no clear answer.
Some people say it’s very unlikely that anyone from our time could have gone back in time, while others come up with crazy ideas like aliens visiting Earth or other kinds of advanced technology that would go against all known laws of physics.