Computers that can read your face and emotions
20 April 2012 Last updated at 12:04 BST
Computers can do some amazing things nowadays and they know an awful lot about us.
One thing they can't understand is how we're feeling!
But that could soon change. Scientists in America are trying to teach computers how to recognise our emotions- so they'll be able to tell whether we're happy or sad!
Check this out!