They say the only constant in life is change. In mathematics, however, there are many constants and today, we"re celebrating perhaps the most famous of them all: pi. Represented by the symbol π, this tasty-sounding number is the ratio of a circle"s circumference to its diameter, approximately 3.14159. Every March 14, mathematics fans across the world get baking to mark Pi Day with a pie. It began in 1988, when physicist Larry Shaw connected the date (3/14) with the first three digits of π. Today, mathematicians and enthusiasts celebrate Pi Day with pie eating and pi reciting. Did you know that when your clock strikes 1:59 today, you will be three decimal places closer to the real value of pi? Pi is everywhere, even in nature. Pictured here is a bodhi tree which has grown over an arch into the shape of the pi symbol at Wat Phra Ngam, a temple in Ayutthaya, Thailand. Whether you"re a math geek or just in it for the treats, Pi Day is for everyone to enjoy!
Happy Pi Day!
Today in History
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Our Lady of the Rocks
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International Archaeology Day
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National Hummingbird Day
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Take the stairs
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A cliff-hanging complex of temples
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International Lighthouse Weekend
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National Pearl Harbor Remembrance Day
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National Audubon Society s Christmas Bird Count
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Everybody loves World Turtle Day
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In praise of bogs, swamps, and marshes
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Honoring the first American woman in space
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Astronomy Day
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Spring equinox
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Where is this wintry road?
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First day of autumn
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On the rebirth of the Olympic Games
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Berlin Festival of Lights
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Thomsons gazelles, Maasai Mara, Kenya
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Happy Fourth of July!
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Land ho in New Zealand 250 years ago
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Lupine flowers in bloom, Northern California
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Siblings Day
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Grand Canyon National Park turns 105
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Lantern Festival
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World Penguin Day
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Citizenship Day and Constitution Day
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Happy New Year! (Again!)
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A walk among the giants
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World Meteorological Day
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Looking for peace on the precipice
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