Pi Day is celebrated today, 14 March, round the world. Pi (Greek letter π) is the symbol used in mathematics to represent a constant — the ratio of the circumference of a circle to its ...

Lance Geiger of The History Guy explained the very long history and tasty history behind apple pie, noting how apples, sugar, and certain spices were reserved for the wealthy long before it became ...

Pi Day (March 14) is a reason for math lovers to celebrate the famous symbol. The numerical form of the date, 3/14, is the ...