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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Greetings from Asbury Park
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National Llama Day
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50 years of World Heritage Sites
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National Hummingbird Day
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A polar bear near Churchill, Manitoba, Canada
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Góða ólavsøku, from the Faroes!
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Evidence of human habitation
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Spring comes to Glacier National Park
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Don’t get lost in there
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Hidden beauty in Thailand
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It s fair season
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Iguazu Falls at the border of Argentina and Brazil
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A lush, green escape
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Merry Christmas
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International Day of the Worlds Indigenous Peoples
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Gray days ahead in Monterey
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A festival of colors
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Northern hawk-owl
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Everest s shadow on the Himalayas
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Kings Mountain, Chugach Mountains, Alaska
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Gemsbok in Namibian sand dunes
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Overseas Highway, Florida Keys
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Moose, Denali National Park, Alaska
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Naxos in the Cyclades Islands of Greece
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Is this Minecraft headquarters?
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Sequoia National Parks 134th anniversary
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An island oasis in the Indian Ocean
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Shi Shi Beach, Olympic National Park, Washington
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Avatars of the Wolf Moon
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What’s blooming in New Zealand?
Bing Wallpaper Gallery

