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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A hint of spring
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An emerald isle of the Emerald Isle
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In the Highlands for Saint Andrew s Day
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It s Computer Science Education Week
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When an ideal microclimate gives you lemons…
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Lake Tai s cherry trees in bloom
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Schönbrunn Palace Park, Vienna, Austria
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Native American Heritage Month
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International Rock Day
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World Bamboo Day
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World Turtle Day
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The Guggenheim Bilbao turns 25
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The Old City of Bern
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Yi Peng Festival in Chiang Mai, Thailand
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Let the Highland games begin
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Rocky mountain pi
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Taughannock Falls State Park
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World Honey Bee Day
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Penguin Awareness Day
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Big dreams require a big sleigh
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New Year s Eve
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Milford Sound/Piopiotahi rainforest in New Zealand
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Pining for spring
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Southern right whales sail home to South Africa
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National Take a Hike Day
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Kinder Scout, Peak District National Park, England
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International Haiku Poetry Day
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King of the dinosaurs
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International Day for Biological Diversity
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A story of wind and ice