New age recognition software, developed at the University of Illinois, Urbana-Champaign, analyzes images of your face to verify your age. “Age measurement is very difficult,” said Thomas Huang, the lead developer. “If you use the face to estimate age we can really get the apparent age, or how old a person looks.” The researches used 1,600 different people to hone their algorithm. The computer searched the faces and used its own software to determine which features best determined the person’s apparent age.

[From New Software Guesses a Person's (Apparent) Age: Discovery News]