Brain Power

Yuri Geller claims he can bend spoons simply by using his brain. In the South Korean city of Taejon, people are learning a very similar trick — though they need a computer between themselves and the cutlery. Here's how the experimental software works. You don an electrode-studded cap that monitors brain waves and sends data to a computer that displays a virtual spoon. Different types of mental activity produce distinct signals in the brain, and the computer can discern, in a crude way, what's going on inside your head. To make the spoon bend, you have to relax. When the computer...