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. This tasty-sounding constant 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—a celebration of both the mathematical constant π and its delicious homophone, pie. It began in 1988, when physicist Larry Shaw connected the date (3/14) with the first three digits of this constant. 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 in 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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Seceda, Dolomites, South Tyrol, Italy
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World Hello Day
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Autumn colours below Mount Sneffels near Ridgway, Colorado, United States
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Last Night of the Proms
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Bridging past and present
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When life imitates art
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International Archaeology Day
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Lake Superior, Grand Marais, Minnesota, United States
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SantaPark, Lapland, Finland
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The 80th anniversary of D-Day
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Andean cocks-of-the-rock, Ecuador
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World Teachers Day
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Bewitched by the fairy flower
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International Dark Sky Week
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Sway with the Amazonian canopy
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Queen Elizabeth II (1926–2022)
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Nap your worries away
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Christmas Bird Count turns 125
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Taking a New Year nap
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Saint Patricks Day
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Piecing together a better tomorrow
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Happy New Year!
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Unbe-leaf-able
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Bristol International Balloon Fiesta
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Saint Davids Day
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Why is this cliffside ablaze?
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Birch trees, Drammen, Norway
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A chocolate lovers favourite fruit
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World Giraffe Day
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Sligachan Old Bridge, Isle of Skye, Scotland
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