On Fibonacci Day, mathematicians and scientists honor one of their own: Leonardo Bonacci, better known as Fibonacci. The medieval mathematician popularized the Hindu-Arabic numeral system, with its use of zero, decimal points, and 10 numbers instead of the ponderous Roman numeral system. He"s most famous, however, for his sequence of numbers: 0, 1, 1, 2, 3, 5, 8... By adding the first two numbers, you arrive at the third, and adding the previous two numbers, you arrive at the next number, and so on. Disregarding the zero, the first four numbers correspond to today"s date, 11/23.
Fibonacci Day
Today in History
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Everglades National Park turns 75
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The globe skimmers return
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Cordouan Lighthouse, France
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Grand Canyon National Park anniversary
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What the hay?
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Koala in the Great Otway National Park, Australia
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Arrr! Can you talk like a pirate?
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May the Fourth be with you…
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Sequoia National Parks 134th anniversary
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A day of death and rebirth
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Ancient groves in Australia
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Chapel of St. Michel on Lake Serre-Ponçon, Hautes-Alpes, France
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The scene of a literary crime
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Defying gravity on a swing ride
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Vacuum Chamber 5 at Glenn Research Center
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Anza-Borrego Desert State Park, California
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Coming home to roost
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A grotesque scene
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Birds of a feather
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What a twist
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The Millennium at 20
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Winter in the Finnish wilds
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Humming along
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World Poetry Day
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Veterans Day
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Composite image of a lunar eclipse
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