Add Yahoo as a preferred source to see more of our stories on Google. Thursday, March 14, is National Pi Day, a time to celebrate the number that represents the ratio of a circle's circumference to ...

It isn't The Pioneer Woman without "pi!" In the baking sense, Ree Drummond is no stranger to the pastry, whether she's whipping up apple pie, pot pie, or Ladd's favorite chocolate pie. One of the best ...

SAN FRANCISCO -- Every March 14, mathematicians, scientists and math lovers around the world celebrate Pi Day, a commemoration of the mathematical sign Pi. That's because the date written numerically ...

A Brooklyn artist trademarks the 3,000-year-old mathematical symbol 'pi' and starts flooding math-clothing producers with cease and desist letters.Click here to watch the story from Jen Markham. A ...

To some people, Pi Day is about mathematics. To others, it’s an excuse to eat pizza. Either way, there will be celebrations on Friday, March 14. Pi is the ratio of a circle’s circumference to its ...

Thursday, March 14, is National Pi Day, a time to celebrate the number that represents the ratio of a circle's circumference to its diameter. The number is known as π, the first letter of the Greek ...