It"s Pi Day, the day we celebrate the mathematical constant π. This day was chosen because today"s date, March 14, expressed numerically, matches the number"s first digits, 3.14. Pi represents the ratio of a circle"s circumference to its diameter. It can be used to compute the area and circumference of a circle, such as the circles that make up this bridge we"re looking at here in Copenhagen. (Who said math wasn"t useful in the real world?) Many people mark the day with activities based around mathematics—and most also serve pie. We can"t think of a more delicious way to study geometry.
A circular celebration
Today in History
More Desktop Wallpapers:
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A notorious advocate for women
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Edinburgh Art Festival
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World Space Week begins
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Stepping into autumn
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Unearthing a queen s lost tale
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Midnight sun
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A long path to freedom
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I ll call for pen and ink
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Daiichi Tadami River Bridge, Fukushima, Japan
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It s Census Day—make it count
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National Go Birding Day
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National Park Week: Canyonlands National Park, Utah
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Hawaii Volcanoes National Park turns 103
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Corfe gets creepy
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Life in the slow lane
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National Moon Day
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A temple, preserved
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Christmas Eve
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Bromo Tengger Semeru National Park, East Java, Indonesia
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The lemurs of Madagascar
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Happy anniversary to the National Park Service!
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Beware the Ides of March
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On the Route of the Waterfalls
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India Republic Day
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The desert blooms
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This reef is nowhere near the sea…
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Meandering through Patagonia
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Siblings Day
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Pretty in pink, and purple, and red…
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Hooray, hooray, it s Unicorn Day!