Convergence of Miss Korea faces
After seeing a Reddit post on the convergence of Miss Korea faces, supposedly due to high rates of plastic surgery, graduate student Jia-Bin Huang analyzed the faces of 20 contestants. Below is a short video of each face slowly transitioning to the other.
From the video and pictures it's pretty clear that the photos look similar, but Huang took it a step further with a handful of computer vision techniques to quantify the likeness between faces. And again, the analysis shows similarity between the photos, so the gut reaction is that the contestants are nearly identical.
However, you have to assume that the pictures are accurate representations of the contestants, which doesn't seem to pan out at all. It's amazing what some makeup, hair, and photoshop can do.
You gotta consider your data source before you make assumptions about what that data represents.