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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Racing toward history
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World Teachers Day
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Boxing Day
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Glowworm caves in Australia
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Anza-Borrego Desert State Park, California
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Panda Day
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Humpbacks return to the Inside Passage
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Merry Christmas!
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Wandering Watkins Glen
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Pegadung Rock, Lampung, Sumatra, Indonesia
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Al-Khazneh in Petra, Jordan
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Death Valley National Park, California
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Blue Lagoon spa, Grindavík, Iceland
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Let’s talk fossils
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Road-trip worthy attraction in the heartland
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Vineyards in the Mosel Valley, Rhineland-Palatinate, Germany
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Channel Country, Australia
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Poinsettia Day
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Where fire meets water
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Porto Timoni beach, Greece
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West Cornwall Covered Bridge, Connecticut
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Sailing across the ice
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Red fox
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Halemaumau Crater, Hawaii Volcanoes National Park
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Happy Syttende Mai!
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Duck, duck. duck, duck, duck...
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International Rock Day
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World Oceans Day
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Aerial view of Plaza Mayor, Madrid, Spain
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Yosemite National Park turns 132
Bing Wallpaper Gallery

