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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Sperm whale
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Old city wall of Hwaseong Fortress, Suwon, South Korea
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Sandhill cranes, Bosque del Apache National Wildlife Refuge, United States
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Dunluce Castle, County Antrim, Northern Ireland
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Eurasian lynx, Siberia
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Thick-billed raven
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Grand Prismatic Spring, Yellowstone National Park
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Mont-Saint-Michel, Normandy, France
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Tulip fields in spring, Skagit Valley, Washington, USA
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Dhaka, Bangladesh
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Skradinski Buk Waterfall, Krka National Park, Croatia
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Red fox
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Lava flows spill into the ocean on Big Island, Hawaii
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Nuuk, Greenland
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Basilica of Santa Maria della Salute, Venice, Italy
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Brown pelican, San Diego, California, United States
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Taughannock Falls State Park, New York, USA
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Village of Zahara de la Sierra, Cadiz, Spain
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Bengal tiger, India
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Inside the Nobel Peace Centre, Oslo, Norway
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African buffalo, Ngorongoro Crater, Tanzania
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Kerala, India
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Harbour and longtail boats at Ko Samui, Thailand
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Atlantic puffin in Elliston, Newfoundland, Canada
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Helsinki, Uusimaa, Finland
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European hedgehog
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Tremola Road on the Saint Gotthard Pass in Airolo, Switzerland
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Gran Paradiso National Park, Italy
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Duomo Santa Maria del Fiore, Florence
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Steller sea lions
Bing Wallpaper Gallery

