More commonly known as Fibonacci, Leonardo Bonacci is notable for popularising 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.
Spiral aloe, Kangaroo Island, Australia
Today in History
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Eurasian blue tit, United Kingdom
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Eurasian red squirrel
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Monarch butterflies
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Iguazú Falls, Foz do Iguaçu, Brazil
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Kenai Fjords National Park, Seward, Alaska, United States
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Prasat Phanom Rung temple ruins, Thailand
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Leopard mother grooming her cub, Jao Reserve, Botswana
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Rapa Nui National Park, Easter Island, Chile
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Camels in the desert, United Arab Emirates
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Kelimutu, Flores, Indonesia
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Lake Tyrrell, Victoria, Australia
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Palouse region, Idaho, USA
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Short-eared owl
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Sunrise at a vineyard in Bordeaux, France
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Lake Bled, Slovenia
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Bicycles on a bridge in Utrecht, Netherlands
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Poinsettia flower
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Mount Assiniboine Provincial Park, Canada
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Przewalskis horses, Hustai National Park, Mongolia
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Lechwe herd, Botswana
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Cypress trees in George L. Smith State Park, Georgia, United States
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Moeraki Boulders, South Island, New Zealand
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Champaka Sarasi, Shivamogga, Karnataka, India
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The ruins of an ancient monastery, Skellig Michael, Ireland
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Poinsettias
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Tulip fields in spring, Skagit Valley, Washington, USA
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Seceda, Dolomites, South Tyrol, Italy
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Amethyst laccaria mushrooms, Seabeck, Washington, United States
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Union Square, Manhattan, New York, USA
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Bryce Canyon National Park, Utah, United States