If you are moving past me at 10 miles per hour and throw a ball at 10 miles per hour, then from my perspective the ball is moving at 20 miles per hour. But if you are moving at 400 million miles per hour and throw the ball at 400 million miles per hour, then from my perspective the ball is moving at about 590 million miles per hour. This happens because the speeds involved are close to the speed of light, which is 670,616,629 miles per hour. It is a strange consequence of Einstein's theory of special relativity. We will derive an equation for adding speeds together for very fast objects using only the fact that the speed of light is the same for everyone.

Come learn about what about what computers *can't* do, no matter how powerful they get. We will discuss, and where possible prove, the following facts: - All computers can solve the same problems, given enough time and memory. - The problems that a computer can solve can also be solved by hand, given enough time. Likewise, problems that can be solved by hand can also be solved by computers. - There are problems that no computer can solve efficiently. - There are problems that no computer can solve at all.