Long before pi had a name, people were drawn to its mystery. Every year on March 14, Pi Day highlights one of math"s most recognizable constants. The date reflects the first three digits of pi (π), the ratio of a circle"s circumference to its diameter: 3.14. Pi"s infinite, nonrepeating decimal has fascinated thinkers for a long time. The modern celebration began in 1988, when physicist Larry Shaw marked the day with a fitting tribute: serving pie.
Celebrating Pi Day
Today in History
More Desktop Wallpapers:
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Patriot Day
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Tall, taller, tallest
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Happy Independence Day!
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Ruins of St. Dwynwens Church, Ynys Llanddwyn, Wales
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A Portuguese fort takes a star turn
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Native American Heritage Day
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Petroglyphs near Fruita in Capitol Reef National Park, Utah
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Tasiilaq, Greenland
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Oymyakon, Russia
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You won’t see this on Mulberry Street
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Temple of Philae, Aswan, Egypt
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Great Fountain Geyser, Yellowstone National Park, Wyoming
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Travel Sunday: Sintra, Portugal
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Welcome to the Year of the Pig
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Methoni Castle, Messenia, Greece
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La Geria wine region, Lanzarote, Canary Islands
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Sitka shines on Alaska Day
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Great Backyard Bird Count
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European beech forest, Belgium
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Northern hawk-owl
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Pups of the prairie
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Don’t get lost in there
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A little bit of Wonderland in New York City
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Pretty poetic for a pit
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Books for children of all ages
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Natural Bridges State Beach in Santa Cruz, California
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The island fox’s incredible comeback
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Tracking ships on the Day of the Seafarer
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Irohazaka road
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African bush elephants in Namibia
Bing Wallpaper Gallery

