Fermi's paradox is based on the argument that there are possibly 40 million to 80 million planets in our Galaxy which could be inhabited by high tech civilizations. The paradox is in the form of a question: if there are this many high tech civilizations, why haven't they contacted us? The answer is found in this essay.
This paper proves that the value of pi cannot be infinite. The ancient Greeks and today's mathematicians have used a circle of infinite points. But in three dimensional reality (the world we live in) an infinite distance cannot exist between two objects and a straight line cannot be infinite. This essay shows how these concepts are used to limit pi to a finite value.