Pi is the most interesting number. I was thinking about the value for Pi that is accepted by the Scientific and Mathematic community, which starts off as 3.141592653... and so on to infinity. My question is, How did they get this value of Pi as the most approximate? Did they use extremely fine implements of measuring, or is there a clever mathematical way of finding what the exact decimal values are out to a certain number of places? I don't know. Also, since pi goes on into infinity, does that mean that the circumference of a circle has no exact value?