Most of us first hear about the irrational number π (pi)—rounded off as 3.14, with an infinite number of decimal digits—in school, where we learn about its use in the context of a circle. More ...

As long as science fiction has had a coherent existence, writers and critics have debated its relevance to science. From Jules Verne and H.G. Wells, through Hugo Gernsback and John W. Campbell, Jr., ...