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
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Mylopotamos, Thessaly, Greece
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Lake Bled, Slovenia
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Oxbow Bend on the Snake River, Grand Teton National Park, Wyoming, United States
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Carnival of Venice
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Lake Tyrrell, Victoria, Australia
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International Day of the Tropics
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Tulips, Netherlands
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Ad-Deir, Petra, Jordan
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Earth Day
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A cuddling pair of Taiwan yuhina
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Sequoia National Park, California, USA
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Computer Science Week
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Mesquite Flat Sand Dunes in Death Valley National Park, United States
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Fossils of belemnites and ammonites, Jurassic Coast, UK
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Perseid meteor shower over Nevada
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Reddy for winter
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The road less taken?
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Oud-West neighbourhood, Amsterdam, Netherlands
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Edinburgh Festival Fringe
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Everglades National Park, Florida, United States
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Pride and Joy
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The ‘eighth wonder?’
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Carlsbad Caverns National Park, New Mexico, USA
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Knuthöjdsmossen nature reserve, Sweden
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A delightful day for donkeys
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Bodie State Historic Park, California, United States
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Fisgard Lighthouse National Historic Site
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An engineering marvel
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International Zebra Day
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Martimoaapa Mire Reserve, Finland
Bing Wallpaper Gallery

