This photo of a Native American girl captured in 1894 has been going viral online.
Because the subject of the photograph is smiling.
It's a fact that most of us probably aren't aware of, but photo portraits from over 100 years ago rarely captured the subject showing any kind of emotion.
As a result, the image of the girl, named O-o-dee, has been getting a lot of attention.
Find out more in the video above.