Is there intelligent life in the universe? Could the people who have believed in it for centuries be right? People who put their faith in science are puzzled. And now they have a definitive answer.

Probability 1 answers this question with a resounding Yes, there must be intelligent life in the universe. Amir Aczel, mathematician and author of the beloved Fermat's Last Theorem, proves the point with a combination of science and math. Aczel shows how the history of space discovery and probability theory come together to prove that we are not alone in the universe.

Interplanetary travel for the armchair scientist, Probability 1 offers a rational take on the issue for the skeptic and the true believer alike.