This feature requires version 9 or higher of the Adobe Flash Player.Get the latest Flash Player.

Listen to this 'Talk of the Nation' topic

Biometric technologies are ineffably cool. For those not geeky enough to know, biometrics are measurements that allow you to recognize a person using distinguishing traits. For instance, if you were to wake up one morning with your eye (or eyes) so horribly swollen and crazy-looking* that you were unrecognizable, your fingerprint (a common biometric) would enable you to be recognized, despite the bad case of monster-eye. Using biometrics as identifiers is getting more and more common; students are paying for their meals with their thumbs, airports are looking into iris scanning — soon, you won't need a password for anything. Today, we're going to update you on the latest in biometric technologies... how do you feel about the new identifiers? Too Minority Report?

*I woke up this morning with a wild allergic reaction in my eye, and many of my co-workers probably thought I was Robert DeNiro with long hair when I came in this afternoon.