She takes an old photo and painstakingly recreates it in the present with the same person, the same clothes, the same background. I've so enjoyed looking at it. Some are really funny but mostly they're just so intriguing and thought provoking.
Here are a few examples. Take a look at the whole Back to the Future project.
If you like, then take a look at the more amateur, but also fun, old-me-new-me.