Happy Pi Day, everyone! Pi Day honors the number pi, the ratio
of circumference to diameter of a circle, which is approximately
3.14. It is also Albert Einstein's birthday. And it sounds like
"pie." It's hard to know who was the first person who decided to
bake a pie on March 14. These days, there are celebrations
worldwide - on the Internet, in schools and among friends who
like to eat sweets. But the San Francisco Exploratorium takes
credit for the first Pi Day in 1988. The day was "founded" by
Larry Shaw, who worked in the electronics group at that time.
The Exploratorium is going all out for its 25th anniversary of
pi parties. It just so happens that the museum is moving to Pier
15 next month. Thursday, in front of its new location, the
museum is unveiling a circular "pi shrine" where Pi Day will be
celebrated. The shrine consists of a pi symbol with digits
spiraling around it that will be embedded in the sidewalk. "Kind
of like in Hollywood where you plant the hands and feet of
celebrities, we're going t