This might be the most frightening scientific development we've ever heard about.  Scientists at the University of California, Berkeley have managed to successfully "hack" private information out of people's brains.  And they did it using a device that only costs about $300.

The team used a device called Emotiv, which is a tool that lets people interact with computers using just their THOUGHTS.  The scientists hooked people up to computers using Emotiv, then monitored their brain scans. They'd show the subjects images of things like banks and ATMs, and could actually READ their PIN NUMBERS when they popped into their heads. 

They also flashed images of people, and could tell if the subjects knew them or not. The scientists say it isn't 100% effective, there's room for error, and there's a lot of work to be done before it could be used as something like a more effective lie detector test for the police. 

Scientists are on the way to reading your mind.  Who's afraid?