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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A sky full of stars
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Belém Tower, Lisbon, Portugal
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What are these unique creatures?
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Fallow deer, Bradgate Park, Leicestershire, England
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Hot enough to howl
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Village of Santa Maddalena, Dolomites, Italy
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When ice imitates art
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Red fox mother kissing her baby
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Trullo buildings in Alberobello, Apulia, Italy
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It’s time for the Calgary Stampede!
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Füzér Castle in the Zemplén Mountains, Hungary
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Celebrating the tropics
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Keep practicing, little guy
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Minnesota State Capitol, St. Paul, Minnesota, United States
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Wallabies at sunrise, Australia
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Whooper swans
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Happy International Astronomy Day!
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Sligachan Old Bridge, Isle of Skye, Scotland
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Banff National Park, Alberta
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Waitangi Day in New Zealand
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In the tropics, land greets sea warmly
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Katmai National Park, Alaska, USA
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World Turtle Day
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Mosque-Cathedral of Córdoba, Andalusia, Spain
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World Olive Tree Day
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Paradise Cave, Phong Nha-Ke Bang National Park, Vietnam
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A delightfully ornate Easter display
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Cascade in the City of Waterfalls
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Pollinator Week
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