When someone in a movie tries to give a robot or a computer human intuition, things rarely go according to plan. The machines glitch out and become bloodthirsty killers that risk human lives to adhere to a narrow set of principles, or even worse, they turn into Robin Williams from "Bicentennial Man."
Plus, human emotions are hard to understand. Sometimes we can't even figure out what makes us happy. A group of researchers in the UK claim they have a device that may be able to do just that -- make us happy -- in our very own homes.