The number 1888081808881 is interesting on several counts. First, it’s a prime number, evenly divisible only by itself and 1. In base 10, it’s also a palindromic number. It has the same sequence of ...

Egypt's pyramids are stunning — the Great Pyramid of Giza, in particular, is the last surviving wonder of the ancient world. But although dozens of these structures dot the landscape, is it known ...