PORTLAND, Ore. — Today is March 14, known as Pi Day for the famous mathematical constant — but it’s also Albert Einstein’s birthday. And while most people recognize Einstein for his famous equation, E ...

Add Yahoo as a preferred source to see more of our stories on Google. Angie the Pie Lady's birthday just happens to be on Pi Day, March 14. We surprise her in the Idaho Today studio.

Math rarely starts a shopping rush, but Pi Day pulls it off every March 14. As the date lines up with 3.14, restaurants, bakeries and convenience chains roll out $3.14 deals, turning the digits of pi ...