National Pi Day is recognized today in the U.S. and around the world. Here's what to know about the quirky holiday, and how to celebrate.

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

Thursday marks National Pi Day in the United States and around the world. The holiday commemorates a timeless symbol beloved by many in mathematical and scientific communities, while making the ...

Pi Day is the annual celebration of the mathematical constant, Pi. Here's what to know about its date, and why we celebrate it by eating pie.

The pi symbol isn't readily available on your iPhone's default keyboard, but there are tricks you can do to change that and have it available whenever you need.

Yet even after mathematicians worked out how to calculate pi accurately to over 100 decimal places at the start of the 18th century, we didn’t have an agreed symbol for the number. Math Pi-oneer ...

He wants the whole pi. An entrepreneurial Brooklyn artist has trademarked the ancient Greek mathematical symbol — adding a period to the end — to brand his line of T-shirts, tank tops a… ...

It's Pi Day, and the world is celebrating more than just the Greek mathematical symbol (π). Retailers and restaurants everywhere have deals today. The folks at Offers.com have provided a list of ...

While Pi Day was only officially instated as a national holiday in 2009, the mathematical symbol, Pi, has been around for 4,000 years.

It's Pi Day, and the world is celebrating more than just the Greek mathematical symbol (π). Retailers and restaurants everywhere have deals today. The folks at Offers.com have provided a list of ...