Robots are becoming a big part of our lives. There may be half a million robots in the U.S 20 years from now. These machines are changing the way of work that is being done. Thousands of robots are used in factories. These robots are not like the robots in movies. They don't walk or talk. Instead, a robot may be just metal arm. The robot arm can do a certain job in a factory over and over again. it can do jobs that people may not want to do. A robot never gets tired of doing the same thing. Sometimes a robot gets to do more exciting work. In Canada, police are using a robot on wheels. This robot's job is to take apart bombs that may go off.