Someone on Facebook found a photograph of children in the Yukon gold rush from 1898 and noticed that one of the children looks exactly like Greta Thunberg, sparking a social media frenzy of time traveler conspiracies.
The photograph does bear an uncanny resemblance to the climate change activist, leading many people to believe the image is photoshopped. It turns out that the image is real. Here is the original link to it, which is in the archives of the University of Washington.
Twitter has had a field day with it though. Here are a few great tweets: