Today’s question is from Venkatesh.
Give the fascinating story behind this picture and the relation to the book.
Quoting Dinesh, the first visual is the Ulam spiral discovered by mathematician Stanislaw Ulam that reveals surprising and as yet not completely understood patterns in prime number spirals. A couple of years before the discovery of the spiral, Arthur C. Clarke described a very similar idea in his novel “The city and the stars”. Read more about this here.