Though generations of schoolchildren have cursed arithmetic, the world was a much more inconvenient place without it. Before the advent of modern arithmetic in the 13th century, basic calculations ...

“Do you see the pattern? Each number in the series after the first two numbers is the sum of the preceding two numbers.” That’s how I began my last column focusing on the Fibonacci sequence, which ...

Pine cones. Stock-market quotations. Sunflowers. Classical architecture. Reproduction of bees. Roman poetry. What do they have in common? In one way or another, these and many more creations of nature ...