Along the left side of a cold, gray cement building on Alcatraz Island, hundreds of colorful NFL jerseys suspended on clothesline hang limp in the cold air. The building is about as long as a football ...

Katie has a PhD in maths, specializing in the intersection of dynamical systems and number theory. She reports on topics from maths and history to society and animals. Katie has a PhD in maths, ...

The ancient scholar Hippasus of Metapontum was punished with death for his discovery of irrational numbers—or at least that’s the legend. What actually happened in the fifth century B.C.E. is far from ...

Originally defined as the ratio between the circumference of a circle and its diameter, pi — written as the Greek letter π — ...