We've seen stitched together "gigapixel" photos made of a billion pixels before, but they tend to be reserved for huge landscapes. Photographer Daniel Boschung has taken absurdly high resolution methodology and applied it to a much smaller area: the human face.
Boschung's "Face Cartographies" are captured by a robot that's been programmed specifically for the task. Each 900 megapixel face map is comprised of 600 individual photos, taken by a Canon 5D Mark II outfitted with a 180mm macro lens. The process of taking all of the photos required for the the final composite image takes about 30 minutes to complete. That's a long time for the models to sit still.
What do you see deep in a human face at a resolution of 900 million pixels? You see all the glorious texture that makes us more than just a two dimensional painting or just a simple low-resolution photograph. Indeed, it's more than we can see with the unaided eye, since the photos are higher resolution than what your eye can see.