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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Library of Trinity College Dublin, Ireland
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Cenote Nicte-Ha, Tulum, Mexico
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Bwindi Impenetrable Forest, Uganda
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Crescent-tail bigeye fish, Great Barrier Reef, Australia
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The Circus, Bath, Somerset, England
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Snowdrops in spring
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Palazzo Zuccari, Rome, Italy
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Burns National Heritage Park, Ayr, Ayrshire, Scotland
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Camel thorn trees, Namib-Naukluft Park, Namibia
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Orosei, Sardinia, Italy
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Oloupena Falls, island of Molokai, Hawaii, United States
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Yellowstone National Park, Wyoming, USA
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Russell lupines, Lake Tekapo, New Zealand
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Arches National Park, Utah, United States
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Honey bee on lavender flowers
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Jaswant Thada and Mehrangarh Fort, India
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Humpback whale mother and calf
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Dunquin Pier, County Kerry, Ireland
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Pont de pierre, Bordeaux, France
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Füzér Castle in the Zemplén Mountains, Hungary
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Everglades National Park, Florida, USA
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Rice terraces of Mù Cang Chải, Yên Bái province, Vietnam
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Macaroni penguins
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Short-beaked echidna, Adelaide Hills, Australia
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Male white rhinoceroses
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The Shard, London, England
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Bora Bora in French Polynesia
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Megalong Valley, Blue Mountains National Park, NSW, Australia
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Bicycles on a bridge in Utrecht, Netherlands
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Red-crowned crane
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