A research group at NVIDIA trained neural network algorithms to teach each other to create artificial but photorealistic images of human faces. The team features FCAI professor Jaakko Lehtinen.
Read more here (New York Times).
Or if hit by the NYT paywall, here's Wired and professor Lehtinen on the subject: http://www.wired.co.uk/article/fake-images-video-nvidia-news-online-twitter-facebook-digital-forensics
Also a story in The Verge: https://www.theverge.com/2017/10/30/16569402/ai-generate-fake-faces-celebs-nvidia-gan