Autumn 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 autumn 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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Kasilof River, Alaska, United States
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So good, they built it twice
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Mount Assiniboine Provincial Park, British Columbia, Canada
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Autumn equinox
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Tom McCall Waterfront Park, Portland, Oregon, United States
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Town of Pienza in Tuscany, Italy
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Black bear cub emerges into spring
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Bamburgh Castle, Northumberland, England
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Royal Alcázar of Seville, Spain
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This bird is peak beak
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Whanganui National Park, Retaruke, New Zealand
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International Day of Light
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Lion, Queen Elizabeth National Park, Uganda
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Castell Coch, Wales
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The Great Blue Hole, Belize
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Black lava beach, El Golfo, Lanzarote, Canary Islands, Spain
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Discovery Day in Yukon, Canada
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A public restroom or a tourist spot?
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World Childrens Day
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Groundhog Day
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Sea lion in a kelp forest, Baja California, Mexico
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Moeraki Boulders, South Island, New Zealand
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Gateway Arch in St Louis, Missouri, United States
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Externsteine in the Teutoburg Forest, North Rhine-Westphalia, Germany
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Merry Christmas!
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The largest gypsum dune field
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The Monastery of Roussanou, Greece
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Wind River, Arctic National Wildlife Refuge, Alaska, USA
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This lake is no mirage
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