Evolutionary biologists generally agree that humans and other living species are descended from bacteria-like ancestors. There are approximately ten times as many bacterial cells in human flora as there are human cells in the body.

When making these portraits, I also took swab tests from the subjects. I grew the samples on top of the transparencies in petri dishes and re-shot the final image.

So what makes the true portrait? The bacteria, the face, the time that passed when the film was exposed or your emotional response to it?