Times may change on a dime in our tumultuous world, but one thing always remains the same: pi, the irrational-mathematical constant, the ol’ circumference/diameter split, the big 3.14159265358979323….

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 ...

Exploratorium employees say this year’s Pi Day — the annual March 14 celebration honoring the number and its associated Greek symbol — will be a mathematical and astronomical delight. Friday’s event, ...

Chris Flink is executive director of the Exploratorium in San Francisco, otherwise known as the birthplace of Pi Day. He speaks about the... On Pi Day, San Francisco's Exploratorium Celebrates With ...

The Exploratorium is helping San Franciscans take a bite out of Pi Day, the annual celebration that originated in The City and honors the number and its associated symbol. The holiday celebration ...