Fall isn"t just marked by the calendar. Each September, Earth"s subtle tilt brings the autumn equinox—one of two times a year when day and night are nearly equal in length. It marks the beginning of fall in the Northern Hemisphere. From solar alignments to changing leaves, nature offers its own quiet signals that the season has shifted. While for most of us it may seem like just another day, ancient cultures paid close attention to this change. Sites like Chichén Itzá in Mexico and England"s Stonehenge were designed to align with the rising or setting sun during equinox days.
Autumn equinox
Today in History
More Desktop Wallpapers:
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Colorful houses of Las Palmas de Gran Canaria, Spain
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Black History Month
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1934 Labor Day parade, Gastonia, North Carolina
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Blue-throated toucanet, Los Quetzales National Park, Costa Rica
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World Wildlife Day
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Village of Santa Maddalena, Dolomites, Italy
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Regional Park of Migliarino, San Rossore, Massaciuccoli, Italy
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Henningsvær Stadion, Norway
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World Wildlife Conservation Day
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Arrone in Umbria, Italy
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A crested partridge
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World Art Day
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Brown bears in Lake Clark National Park and Preserve, Alaska
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‘You should see the one that got away!’
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Perfect timing
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River otters at Acadia National Park, Maine
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Paper lanterns on the longest night
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Punakaiki on South Island, New Zealand
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In Texas, even the riverbend is big
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Celebrating Take Your Dog to Work Day
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American robin
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Big-wave hunters watch Nazaré
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The Crown Jewel of the North Atlantic
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When in Rome...celebrate Saturnalia
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An inland ocean
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Greece celebrates its independence
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World Wildlife Day
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Back to the nest
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Fibonacci Day
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Weaverbird nests at Kenya’s Samburu National Reserve
Bing Wallpaper Gallery

