We all know Donald Trump as that shouty man in America with the thing on his head, but we've never been able to figure out exactly what is going on on top of his noggin.
Some think it may be from an alien planet, some say it's a parasite feeding off his life force - but now we have proof of its origins.
One lucky Redditor found the source in Tromsø, Norway - which is apparently Donald Trump's Hair Island.
Don't believe it? Maybe this will convince you...
It's like something from a horror film.