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 ...

Trying variants of a simple mathematical rule that yields interesting results can lead to additional discoveries and curiosities. The numbers 1, 1, 2, 3, 5, 8, 13, 21, 34, and 55 belong to a famous ...

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 ...

On Friday, March 20, as the U.S. stock market closed out its worst week since 2008 amid coronavirus-related turmoil (before recovering somewhat early the following week), investors were left with a ...

Richard Lee is a specialist in foreign exchange markets, contributing to a number of online platforms, including Yahoo Finance and DailyReckoning. Gordon Scott has been an active investor and ...