It’s Pi Day, the day we celebrate the mathematical constant π. This day was chosen since today’s date expressed numerically (in US format) 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 crop patterns we"re looking at here in Colorado. (Who said math wasn"t useful in the real world?) Many towns, schools, and museums mark the day with festivities based around mathematics and, of course, serving pie. We can’t think of a more delicious way to study geometry.
Rocky mountain pi
Today in History
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Monarch butterflies in Angangueo, Mexico
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Uncommon clouds are gathering
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Caribbean flamingos, Yucatán Peninsula, Mexico
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Helloooooo, Innsbruck
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International Tiger Day
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The Big Blue of the Sierra
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A star is borne by seaweed
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Molokini Crater, Maui, Hawaii
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Mont-Saint-Michel
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What are we looking at?
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Plitvice Lakes National Park in Croatia
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Everglades National Park, Florida
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Okavango Delta, Botswana
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A view fit for a queen
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National Public Lands Day
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Groundhog Day arrives—beyond a shadow of a doubt
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Cherry blossom season in Tokyo
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Rooftops in the walled city of Urbino, Italy
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Mountains fit for a queen
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A day to celebrate the sun
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Wedded Rocks, Japan
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Bear Hole Brook, Catskill Mountains, New York
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Bukhansan National Park, South Korea
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The Crown Jewel of the North Atlantic
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Hyalite Creek at Custer Gallatin National Forest, Montana
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Guiding ships to safety
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Nursing the world to health
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Dallas Latino Cultural Center for Hispanic Heritage
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World Nature Conservation Day
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Surf s up—Down Under
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