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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The tale of squirrels like Nutkin
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Go Fly a Kite Day
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47 years of Badlands National Park
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Let the holiday shopping commence
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Sky island views
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National Dolphin Day
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Bridge of Hillsborough County
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Mountains fit for a queen
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Yosemite National Park anniversary
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Regional Park of Migliarino, San Rossore, Massaciuccoli, Italy
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Anniversary of Pinnacles National Park, California
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Birthplace of Roman emperors
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Big sky at Big Bend
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A sizzling summit hides in the clouds
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An island oasis in the Indian Ocean
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There’s treasure in them thar hills
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Baddest of the badlands
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National Fossil Day
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Aït Benhaddou, Morocco
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My my, it s Syttende Mai
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Happy Mother’s Day
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Happy holidays!
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It s International Jazz Day
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How lovely are your branches
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Ruins of Inca temples and terraces on Huayna Picchu, Peru
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A long, erratic commute
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50 years of Earth Day
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International Day of Human Space Flight
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Glacier Bay National Park and Preserve
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Red fox, Grand Teton National Park, Wyoming
Bing Wallpaper Gallery

