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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So good, they built it twice
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Stealthy pollinators
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Katahdin Woods and Waters National Monument, Maine, USA
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Black-tailed prairie dogs, Badlands National Park, South Dakota, USA
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Remembrance Sunday
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Church of Notre Dame de Bon-Port, Les Sables-dOlonne, France
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What are these colorful insects?
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City Hall, London, England
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A touch of magic
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London Marathon
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Externsteine in the Teutoburg Forest, North Rhine-Westphalia, Germany
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Picture perfect
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Val di Funes, Italy
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International Jazz Day
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Paranormal activity?
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Noah Beach, Queensland, Australia
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World Elephant Day
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Rainbow reflection
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Whats so funny?
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International Museum Day
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Skyscraper Day
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World Wildlife Day
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Lake Tahoe, USA
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Reindeer, Lapland, Finland
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Festivus
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Skaftafell, Vatnajökull National Park, Iceland
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A mountaintop cultural wonder
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Green-crowned brilliant hummingbird
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Love is in the snow
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International Archaeology Day
Bing Wallpaper Gallery

