NOVA | scienceNOW | Profile: Hany Farid | PBS

This self-proclaimed "accidental scientist" is a digital detective inventing new ways to tell if photos have been faked.

Examine nine photographs and guess if they are fake or real. Then hear Hany Farid explain why you were right or wrong.

Father of digital forensics and Dartmouth professor Hany Farid answers your questions on photo fakeries and more.